Without measuring tools, if tracing circle on paper: cut the circle out, fold in half, then fold in half the other way, the middle is where the folds meet.
This is easy way but there is even easier one 😃. When you drew first chord you should have drawn the chord created by the other side of the square. Two end points are on the diameter of the circle and splitting it in half and you are done. This is due to the fact that any inscribed triangle intercepting diameter is right triangle. Thanks for sharing.
Yes yours is the easier way than the video, however, I really learnt two tricks from the video. Keeping the lead long enough to trace the edge accurately, and second, putting the pencil on the circumference first , then moving the edge in to touch the pencil.
Can someone please tell me this... Why don't they teach usefully things like this in school...as opposed to the things which totally confused the hell outta most folk and would never use again once we leave full-time education. An excellent video...simple, straightforward and to the point, no messing around. Thank you for making and sharing this video. ❤❤😊😊
They don't want us to be intelligent, but rather just smart enough to get a mediocre 9 to 5 so they can start collecting income tax right out of High School. If you want to be educated, then you have to pay for it by going to college, yet you'll still be lacking knowledge that should have been taught in grade school. But hey, now you'll have a degree, allowing you to have a more stable and better paying job and they can now collect a larger amount of income tax. 😐
Well, you know, they did teach this in school. In Geometry. In fact, they showed several different methods of finding the center of a circle. And also how to draw accurate tangents. Unfortunately, many students avoided taking Geometry because it was 'hard'. Instead they chose Sociology, or some other fluff course.
I don’t recall half of what I learned in any of my math classes, where I made all A’s, simple because I don’t use it. I also made A’s in all liberal arts classes too, and they were not fluff courses. All of it makes me a better teacher
Very cool! I need to do exactly that--find the center of a circle. It's for a holder for a circular light. I traced the outside of the lamp but want to mount it from the center and you've saved the day. Thank you
Previous writer said he is 70 years old and has learned something new. And me too. I turned 60 in the summer. My hobby includes silver jewelry and leather crafts where the circle is on topic many times. And i have many times when drawing a circle on the silver sheet or leather, where is the center point , instead of just guessing. Here is the answer. Brilliant and thank you. Have you learned this by your self?
Actually, if you already have a compass, you do not need the square to find center. Search RUclips to find out how. But the real reason I am posting is to say I would check my accuracy by simply drawing a couple more chords and follow her procedure. All the lines should meet in the center. Then you know for sure you got it right.
Set the compass to be larger than the radius. Place point on circle edge and draw an arc. Place point on opposite edge draw an arc. Pla ce straight edge across where arcs intersect, draw line. Draw to more arcs do the same. Where the two lines drawn between where the two pairs of arcs intersect is the center of the circle.
@@davidspin5353 Who knows? But I would guess the compass came first: All one needs is a length of string/gut and a center point to draw a circle...then go from there. A right angle is a little more difficult to conceive, and then to create.
There's an easier way, using the same tools, that requires no measuring. Any right angle triangle, with all three corners touching a circle, will have a hypotenuse that perfectly divides that circle. Put the corner of the square on the circle, just like you did in the video, but instead of drawing chords, just mark the two points where the legs of the square intersect the circle. Those two points will be exactly opposite one another regardless of the size of the circle or the orientation of the square. Draw a line between those two points. Turn the square roughly 90 degrees, for a clearer intersection, and repeat the process. The point where those two lines intersect will be the center point of the circle.
Very intuitive trick. Just seeing and reading your thumbnail I was able to deduce how to do it. I watched the video for verification. Additionally, this is very rememberable in its simplicity.
I just did it on a round metal polish container cap just to test it out. It worked correctly and was easy. I think I'll be able to remember how to do it later on without looking up the instructions again.
I like the idea of putting the pencil on the outside of the circle then bringing the inside of the square up to the pencil for more accuracy. Will work as long as the square is well made.
I know they have to teach formal geometry in school, but would be great if they also taught an informal version of practical things, or even for art and do it like this without so much jargon
Seen so many of these videos where "content creators" copy each other without thinking. Dude, place the top of the right angle tool anywhere on the circle, like you did. The two points where the angle arms intersect the circle form a diameter - connect them. Repeat it from a different starting point. The intersection of the two diameters is your centre of the circle. Basic geometry.
Some folks don’t remember basic geometry and appreciate seeing different ways to do it. One of them will make sense to them. And to be a true diameter, the lines would have to pass through the center, which you don’t have yet.
@@HeartwoodArt If the right angle is on the circle, then said lines *are* a diameter, whether you already know where the center is or not. That's actually basic geometry, even described as the last application of Thales's theorem in this Wikipedia article: en.wikipedia.org/wiki/Thales%27s_theorem#Application And actually much more accurate, as you avoid many constructions and mesures.
Do whatever makes the most sense to you and you feel is most accurate with the tools you feel the most comfortable using. There is no single way to do it. Most folks don’t remember basic geometry and just want a simple method. This is one of many.
Very good idea when all you have is a square. I suggest doing at least three lines. Two lines will always intersect, no matter how innacurately you drew the lines, a third line will tell you how accurate you were (if they all intersect at the same point you know you were spot on). Similarly, you can be quite imprecise in drawing the lines, but draw as many lines as you want, and you will make a spot in the middle where all lines missed (because every line was slightly off centre), and this is the true centre. Only need a few lines to get a very close estimate of the exact centre.
Personally, I would do what you did except I would draw two lines anywhere, and set the compass a little over half of one line, make two arcs with point at each end. Then do the same on the other line. Draw line through the arc intersections and extend to near center. Where lines cross is center.
Since you have a protractor and a straight edge, you can simply measure the diameter of the circle by dragging the straight edge across the circle until it is widest. Mark the intersection of your straight edge and the perimeter. Measure this line and divide by 2. That is your center. To double check, set your protactor to the radius, with the pin on the exterio point and draw an arc. Set your pin on a random point on the perimeter and draw an arc through the center. They should both cross at the center. You can do this as many times as you want. If you end up crossing at a point other than center, you are off. You could also simply do the fist step several times. It should cross at the center.
@@HeartwoodArt Thanks. It used to bother me that so many people would thumbsdown a video like this but now that I understand that it's the coding within the platform itself which is doing it. Why you ask - because their goal is to create continual division and angst - because they are evil.
This is a good one and pretty simple. Is there some simple method to find the largest circle (and center i guess too) that will fit inside an irregular boundary shape ? For instance, a slab of wood cut diagonally from a tree whose sides were very wavy, eg not round - like almost star-like with bulges etc.
Perhaps find the widest width with a ruler. That will be the diameter and half that will be the radius and you can draw a circle on paper using that length and place it on the piece for best fit. There are more precise ways using geometry, but they are a bit more complex too.
@lylestavast7652 eye it at first then from that eyed center draw the biggest circle that will fit on your slab from that center. Keep making the circle bigger; moving the center until you find the largest circle that will fit within the boundary of the edges...then find center of that circle. That will get you close.....but if your building a table and your irregular shape is the top; then beef up your support to handle the irregularity of the weight distribution. You could find the biggest square or rectangle that will fit then draw straight line from corner to corner both ways to make an "x". The crossing lines is center of rectangle or square. Still; pay attention to weight distribution.
🤔 Since you have a set square, wouldn't this be easier → position the inside corner on the circle and mark where the arms cross the circle (no measuring needed), joining these marks gives a diameter. Do it again to get another diameter crossing the first, and where the diameters cross is the centre. This is based on the rule that all inscribed right triangles lie on the diameter of the circle.
Just use that protractor, set it to swing a arc off from circle over center. Swing 4 small opposing arcs, then with a straight edge draw two lines thru the arc intersections.
That's one way I suppose, but if you have a compass, just set it as close to half of the diameter of the circle and make a series of pencil marks from the outside line to the centre. Way quicker.
You can also just set the compass at half the measured diameter of the circle and then draw two or three arcs with the pin of the compass on several poits along the circle. Where the arcs cross, that the center.
@@franksellitti4784 because it was for a dog bowl where I didn’t know the size and had a VERY thin lip, so it had to be super accurate, as I was cutting out a hole to hold it in a raised dog feeder. You can’t measure across the bowl with the same accuracy as this method
I think it's a lot easier to just draw two inscribed right triangles. You set up what would have been both triangles. You just needed to draw the other side (chord). Then, instead of measuring and lining up the mid-point ... just complete the hypotenuse of each right triangle. They'll intersect at the center. You can even corroborate the midpoint by drawing a 3rd, 4th, 5th, etc. inscribed right triangle. The hypotenuses will all intersect at the center.
I often need to find the center of a log, which is never a perfect circle. In which case, log horizontal and chocked to prevent rolling, measure top to bottom, divide and mark, side to side, divide and mark, then use a torpedo level to draw horizontal line and vertical line. Center is where those intersect. When done on both ends, I now have four points to join lengthwise with a chalk line, dividing the log into lineal quadrants, and now I have the basis of a 'map' that I can use to create any shape I need.
There's an easier way than that. Put the corner of the framing square anywhere on the edge of the circle. Mark where the legs of the square cross the circle. Draw a line between those two points. Move the square to a different point on the circle and do it again. Where the two lines cross is the center.
Thank you. At 70 years old, I have learned something new.
Will it be useful ?
Ditto, thank you!
Without measuring tools, if tracing circle on paper: cut the circle out, fold in half, then fold in half the other way, the middle is where the folds meet.
Rhat would work. I just wouldn’t want to try to cut that accurately. A little measuring is faster
your way is FAR SIMPLER. Also there's no 'eye balling ' to do. Talk about contradiction.
I understand this technique can be used directly on the wood but when I came to fold it, I ran into difficulty.
At the fold the line will be a mm off.
A circle is a perfect square. Draw a square over the circle, crisscross from the 4corners, bravo! The center appears spot on!
This is easy way but there is even easier one 😃. When you drew first chord you should have drawn the chord created by the other side of the square. Two end points are on the diameter of the circle and splitting it in half and you are done. This is due to the fact that any inscribed triangle intercepting diameter is right triangle. Thanks for sharing.
Yes yours is the easier way than the video, however, I really learnt two tricks from the video. Keeping the lead long enough to trace the edge accurately, and second, putting the pencil on the circumference first , then moving the edge in to touch the pencil.
Can someone please tell me this...
Why don't they teach usefully things like this in school...as opposed to the things which totally confused the hell outta most folk and would never use again once we leave full-time education.
An excellent video...simple, straightforward and to the point, no messing around. Thank you for making and sharing this video. ❤❤😊😊
Thank you! And agree that we need practical, applied geometry in school
They don't want us to be intelligent, but rather just smart enough to get a mediocre 9 to 5 so they can start collecting income tax right out of High School. If you want to be educated, then you have to pay for it by going to college, yet you'll still be lacking knowledge that should have been taught in grade school. But hey, now you'll have a degree, allowing you to have a more stable and better paying job and they can now collect a larger amount of income tax. 😐
Well, you know, they did teach this in school. In Geometry. In fact, they showed several different methods of finding the center of a circle. And also how to draw accurate tangents. Unfortunately, many students avoided taking Geometry because it was 'hard'. Instead they chose Sociology, or some other fluff course.
I don’t recall half of what I learned in any of my math classes, where I made all A’s, simple because I don’t use it. I also made A’s in all liberal arts classes too, and they were not fluff courses. All of it makes me a better teacher
@@johntoe6127 I went to a Catholic High School and this was taught in my Geometry class & Mechanical Drawing class. Paid in full though.
Very cool! I need to do exactly that--find the center of a circle. It's for a holder for a circular light. I traced the outside of the lamp but want to mount it from the center and you've saved the day. Thank you
Hhd😢😢 l.l.😅g82n7.fuxf.😢gbm😅😅ci
Previous writer said he is 70 years old and has learned something new. And me too. I turned 60 in the summer. My hobby includes silver jewelry and leather crafts where the circle is on topic many times. And i have many times when drawing a circle on the silver sheet or leather, where is the center point , instead of just guessing. Here is the answer. Brilliant and thank you. Have you learned this by your self?
@@ristorinne5817 so glad it’s helpful to you. My dad taught me a lot of woodworking tricks and tips
Been in the trades for decades. I never knew this trick. Nice.
Actually, if you already have a compass, you do not need the square to find center. Search RUclips to find out how. But the real reason I am posting is to say I would check my accuracy by simply drawing a couple more chords and follow her procedure. All the lines should meet in the center. Then you know for sure you got it right.
Yep, that would work to confirm it
Set the compass to be larger than the radius. Place point on circle edge and draw an arc. Place point on opposite edge draw an arc. Pla ce straight edge across where arcs intersect, draw line. Draw to more arcs do the same. Where the two lines drawn between where the two pairs of arcs intersect is the center of the circle.
@@clutchpedalreturnsprg7710 there are lots of ways to do it. Not everyone has a compass. So this is a good alternative
what came first the compass or the Square???
@@davidspin5353 Who knows? But I would guess the compass came first: All one needs is a length of string/gut and a center point to draw a circle...then go from there. A right angle is a little more difficult to conceive, and then to create.
Nice technique. Thanks for this video 👍
It's good to try different "angles' to do geometric creations . In grade 10 we were taught how to make a perfect oval on paper.
wow. now if i want to line up my hole saw perfectly, this is it. Thank you.
you can do the same with the devider or compas
There’s at least 20 different ways to do it. This is the one that works best for me
That's a fun way to do it.
There's an easier way, using the same tools, that requires no measuring. Any right angle triangle, with all three corners touching a circle, will have a hypotenuse that perfectly divides that circle. Put the corner of the square on the circle, just like you did in the video, but instead of drawing chords, just mark the two points where the legs of the square intersect the circle. Those two points will be exactly opposite one another regardless of the size of the circle or the orientation of the square. Draw a line between those two points. Turn the square roughly 90 degrees, for a clearer intersection, and repeat the process. The point where those two lines intersect will be the center point of the circle.
I’ll give that a try
Exactly. Just inscribe a couple of rectangle triangles and intersect the diameters. easy!
Thank you so much. This was a big help.
So cool.
Geometry - maths without numbers. You can't get any better than this folks.
she was counting 1/2, and this and that.
Very intuitive trick. Just seeing and reading your thumbnail I was able to deduce how to do it. I watched the video for verification. Additionally, this is very rememberable in its simplicity.
I just did it on a round metal polish container cap just to test it out. It worked correctly and was easy. I think I'll be able to remember how to do it later on without looking up the instructions again.
And just like that, I learned another thing I wish I knew 20+ years ago...
Thank you!
Very helpful, clear directions. Thank you
I like the idea of putting the pencil on the outside of the circle then bringing the inside of the square up to the pencil for more accuracy. Will work as long as the square is well made.
Excellent & Easy way to find out the Centre of any Circle.
Its nice and easy, many ways to get around it, but makes it fun.
SURE WOULD HAVE BEEN NICE TO HAVE YOU FOR A TEACHER WHEN I WAS IN HIGH SCHOOL....🎉🎉🎉🎉 Watching from Houston, TX.🇨🇱🤠
I know they have to teach formal geometry in school, but would be great if they also taught an informal version of practical things, or even for art and do it like this without so much jargon
@@HeartwoodArt Very Happy to have found you, am now a member, will follow. I will also share you with others. 😄
I love this video! Great way to do this. Thanks so much.
Thanks I was just wondering how to do this yesterday and TA DA !, there you are- reading my mind.
I've just looked at the centre of circles before and pin-pointed it by eyesight. Like when I shoot instinctively and hit my target.❤
🌹 Nice video!
🖌️🎨
I was having a crap day and saw your smiling face and it made me feel better so thanks 2 times
Awesome! Today I learned something new. Thanks for sharing.
Legit, that's cool. Thanks you, please keep teaching
Thank you for sharing.
Found your video today, thank you for helping me find the center of a circle for my project!!!!
Yay!! You’re welcome
This makes it easier than all the other laborious task arriving at near the same answer.
Nice job 👍
This is handy for small circles.
Love it, thank you.
Thanks! You learn something new every day.... :)
Thank you so much and to think it was there all the time what am I like thaking you once more.
Thank you very much, that was a blessing.
Great tip! Thanks a lot! 👍👍👌
Thanks for the easy and clear example. Appreciate it!
You're welcome!!
Seen so many of these videos where "content creators" copy each other without thinking. Dude, place the top of the right angle tool anywhere on the circle, like you did. The two points where the angle arms intersect the circle form a diameter - connect them. Repeat it from a different starting point. The intersection of the two diameters is your centre of the circle. Basic geometry.
Some folks don’t remember basic geometry and appreciate seeing different ways to do it. One of them will make sense to them.
And to be a true diameter, the lines would have to pass through the center, which you don’t have yet.
@@HeartwoodArt If the right angle is on the circle, then said lines *are* a diameter, whether you already know where the center is or not. That's actually basic geometry, even described as the last application of Thales's theorem in this Wikipedia article: en.wikipedia.org/wiki/Thales%27s_theorem#Application And actually much more accurate, as you avoid many constructions and mesures.
Do whatever makes the most sense to you and you feel is most accurate with the tools you feel the most comfortable using. There is no single way to do it. Most folks don’t remember basic geometry and just want a simple method. This is one of many.
This was awesome! Thanks! 👍🏻
Very good idea when all you have is a square. I suggest doing at least three lines. Two lines will always intersect, no matter how innacurately you drew the lines, a third line will tell you how accurate you were (if they all intersect at the same point you know you were spot on). Similarly, you can be quite imprecise in drawing the lines, but draw as many lines as you want, and you will make a spot in the middle where all lines missed (because every line was slightly off centre), and this is the true centre. Only need a few lines to get a very close estimate of the exact centre.
That’s a good idea
This a very handy tip! Thanks!
The ways are endless and simple.
Very thanks❤
I like using a compass for this chore.
There are lots of ways to do it. This is the way that works best for me
Math is wonderful, useful and everywhere!
Personally, I would do what you did except I would draw two lines anywhere, and set the compass a little over half of one line, make two arcs with point at each end. Then do the same on the other line. Draw line through the arc intersections and extend to near center. Where lines cross is center.
Since you have a protractor and a straight edge, you can simply measure the diameter of the circle by dragging the straight edge across the circle until it is widest. Mark the intersection of your straight edge and the perimeter. Measure this line and divide by 2. That is your center. To double check, set your protactor to the radius, with the pin on the exterio point and draw an arc. Set your pin on a random point on the perimeter and draw an arc through the center. They should both cross at the center. You can do this as many times as you want. If you end up crossing at a point other than center, you are off. You could also simply do the fist step several times. It should cross at the center.
There are lots of ways to do it. I find this one faster for me
@@HeartwoodArt Thanks. It used to bother me that so many people would thumbsdown a video like this but now that I understand that it's the coding within the platform itself which is doing it. Why you ask - because their goal is to create continual division and angst - because they are evil.
Nice method!
I love it. But I won't remember it the next time I need it, which seems like too often only because it's so frustrating not knowing how.
Mark this video as a Favorite so it’s easy to find next time 😎
Great job! Always been fascinated with geometrics.
Great video thanks
This is a good one and pretty simple. Is there some simple method to find the largest circle (and center i guess too) that will fit inside an irregular boundary shape ? For instance, a slab of wood cut diagonally from a tree whose sides were very wavy, eg not round - like almost star-like with bulges etc.
Perhaps find the widest width with a ruler. That will be the diameter and half that will be the radius and you can draw a circle on paper using that length and place it on the piece for best fit. There are more precise ways using geometry, but they are a bit more complex too.
@lylestavast7652 eye it at first then from that eyed center draw the biggest circle that will fit on your slab from that center. Keep making the circle bigger; moving the center until you find the largest circle that will fit within the boundary of the edges...then find center of that circle. That will get you close.....but if your building a table and your irregular shape is the top; then beef up your support to handle the irregularity of the weight distribution. You could find the biggest square or rectangle that will fit then draw straight line from corner to corner both ways to make an "x". The crossing lines is center of rectangle or square. Still; pay attention to weight distribution.
Excellent. Thank you.
you can do this without any measuring by using a compass to locate the midpoint of the chord.
You would have to do it for 2 chords and that’s still a form of measuring, just with a compass.
thank you nicely explained
🤔 Since you have a set square, wouldn't this be easier → position the inside corner on the circle and mark where the arms cross the circle (no measuring needed), joining these marks gives a diameter. Do it again to get another diameter crossing the first, and where the diameters cross is the centre.
This is based on the rule that all inscribed right triangles lie on the diameter of the circle.
There are lots of ways to do it. This one works for me.
Fantastic idea!
The most awkward and not practical.
Briliant❤. Thank you.
Thank you so much! Very simple. You rock!
Nice, thanks for sharing
Solid tutorial and quick.
Super!
Just use that protractor, set it to swing a arc off from circle over center. Swing 4 small opposing arcs, then with a straight edge draw two lines thru the arc intersections.
There are lots of ways to do it. This one works best for me on any size circle.
Accuracy is important, accuracy is important. Then at 2:00 - “That’s pretty close”. Lol
@@danholtbk7008 that comment was that I happened to lay the square accurately that 2nd time. And as you can see at the end, it was accurate
You are wuuuuuuuunderful!❤
Thanks
I learned in drafting class how to find center with a compass and right angle triangle
Thank you!
That's one way I suppose, but if you have a compass, just set it as close to half of the diameter of the circle and make a series of pencil marks from the outside line to the centre. Way quicker.
I think that’s a lot of guessing. I’d just as soon take 2 minutes to be more accurate.
I use the small protractor hole to find the center of a circle I just made.
If you have a compass just use that to cross the circle at three places, job done.
There are lots of ways to do it. This one works on any size circle.
Ty ma' am🙂
You can also just set the compass at half the measured diameter of the circle and then draw two or three arcs with the pin of the compass on several poits along the circle. Where the arcs cross, that the center.
There are lots of ways to do it and not everyone has a compass, or one that would work on big circles.
Hi
Thank You
😊😊😊
The bisector of the perpendicular bisector of any cord of a circle defines the center.
Of course it does. But nobody remembers their high school geometry class
Love your accent - I've seen a few ways to do this, but this is the easiest. Thanks.
Isn’t there a way to find the centre with dangling string? I remember doing it but can’t remember
@@jaw1970 there may be, I haven’t seen anyone mention it in the comments when they gave alternative methods. There are many ways to do this.
Thank you ! 👍🙏
Brilliant!!!☘
Why not use the COMPASS in the first place
@@franksellitti4784 because it was for a dog bowl where I didn’t know the size and had a VERY thin lip, so it had to be super accurate, as I was cutting out a hole to hold it in a raised dog feeder. You can’t measure across the bowl with the same accuracy as this method
Thank you.
I think it's a lot easier to just draw two inscribed right triangles. You set up what would have been both triangles. You just needed to draw the other side (chord). Then, instead of measuring and lining up the mid-point ... just complete the hypotenuse of each right triangle. They'll intersect at the center. You can even corroborate the midpoint by drawing a 3rd, 4th, 5th, etc. inscribed right triangle. The hypotenuses will all intersect at the center.
@@67L48 there’s at least 14 ways to do it. This is the one that works best for me, especially on large circles
I often need to find the center of a log, which is never a perfect circle. In which case, log horizontal and chocked to prevent rolling, measure top to bottom, divide and mark, side to side, divide and mark, then use a torpedo level to draw horizontal line and vertical line. Center is where those intersect.
When done on both ends, I now have four points to join lengthwise with a chalk line, dividing the log into lineal quadrants, and now I have the basis of a 'map' that I can use to create any shape I need.
That sounds like a good method for that application
super helpful! thank you!
Thank you!!
Nice!!
That was very good. Thank
Thank you very much.
Two parallel chords, equidistant from the circumference, the diagonals from each cord intersect at the centre of the circle.
Yes, but not many folks will remember what all of that means, or the terminology
Thanks!
I like to use my high powered rifle. I always find the center. :)
now that's some good derivative thinking there ! :)
I prefer using a compass set to the radius dimension (1/2 the diameter) to find the center.
That works if you already know the diameter. If you’re working with a random dog bowl to make a feeder, like I was, that may not be possible
You couldd use the compass for a more accurate way to make a perpendicular line that goes over the center..
@@JanBinnendijk there are at least 14 ways to do it. This one works on any size circle, and without a compass, if you don’t happen to have one
Never in my life have I ever had to find the center of a circle.
@@jimwhiting8144 and yet you to the time to leave that comment, which will likely ensure RUclips shows you similar videos
Very good. I can find the center with a dart.
Top noch👍
There's an easier way than that. Put the corner of the framing square anywhere on the edge of the circle. Mark where the legs of the square cross the circle. Draw a line between those two points. Move the square to a different point on the circle and do it again. Where the two lines cross is the center.
There are lots of ways to do it. This is the way that works for me.