Who would have thought the COVID-19 would find me re-visiting high school years of memories? The math I was comfortable with has slipped into the never land of forgetfulness....! Thank you.
+Gabriel Diaz Most of the views are probably coming from his website, and this video is kind of old (still relevant, but old) www.khanacademy.org/math/geometry/analytic-geometry-topic/equation-of-a-circle/v/radius-and-center-for-a-circle-equation-in-standard-form
Then use the distance formula r(radius)=\sqrt((x2-x1)^(2)+(y2-y1)^(2)). They should give you the center and at least one point of the circle. Use those points to make x1, x2 and y1,y2
Is it just me or did he mess up where he threw in (-3) as the value for h? In fact he goes over it and says 'Well what if this negative 3 was a positive 3, but it's not, so it's minus negative three" uhh.. that looks like a +3 to me
Then use the distance formula r(radius)=\sqrt((x2-x1)^(2)+(y2-y1)^(2)). They should give you the center and at least one point of the circle. Use those points to make x1, x2 and y1,y2. You have then figured the radius out and is simple to put (h,k) in the equation because that is what is the center of the circle is.
Who would have thought the COVID-19 would find me re-visiting high school years of memories? The math I was comfortable with has slipped into the never land of forgetfulness....! Thank you.
Who else wishes Khan was your actual math professor ??
Thomas Schmidt better than the idiot I have currently lol
Thomas Schmidt, Well it was. This video and math problems are my school work for the day.
me
I want Khan to narrate my life
0:01 second vid: FAILURE XD
I like how he explains the why the values at the end.
when i realized that distance formula and circle equation thingy are just complication of pythagorean theorem, i'm so glad.
Now i get it, thank you for the explanation :D.
he nail that circle ngl, good stuff mr. khan
"what is the center of this equation and its radius?"
normal person: (-3,4), 7
khan: let's remind ourselves what a circle is.....
You explained it very well
Ushio your (x,y) if that is the center that is what he is using (h,k) for. You would also have to have the radius to complete the equation.
Another great video guys. Thanks as always for making things clear and easy to understand. And organic chemistry too!
Bro u save every schoolchilds career
i love this
*what if my sf= x2+y2 = 20 how am i going to solve for the center?*
I need various form of circle... lesson is equation of circle
thamks
thanks buddy
I love how he has over 2,000,000 subscribers yet doesn't get over 200 likes...or even over 700,000 views hmmm
+Gabriel Diaz
Most of the views are probably coming from his website, and this video is kind of old (still relevant, but old)
www.khanacademy.org/math/geometry/analytic-geometry-topic/equation-of-a-circle/v/radius-and-center-for-a-circle-equation-in-standard-form
what do you do I one of the points is negative
can radius be a decimal?
Super cool!
What if they don't give you the equation
Then use the distance formula r(radius)=\sqrt((x2-x1)^(2)+(y2-y1)^(2)). They should give you the center and at least one point of the circle. Use those points to make x1, x2 and y1,y2
Is it just me or did he mess up where he threw in (-3) as the value for h? In fact he goes over it and says 'Well what if this negative 3 was a positive 3, but it's not, so it's minus negative three" uhh.. that looks like a +3 to me
xogmaster same
He did not make a mistake because the equation says (x-h) and 3 is a positive number, so the only way to make it a negative is to subtract negative 3
+homemade pizza lover 33
Ekrem so you have to manipulate the expression?
this is why math confuses me.
I love you sal
aww but I need how to get the form from two points. So they give me (x,y)
Then use the distance formula r(radius)=\sqrt((x2-x1)^(2)+(y2-y1)^(2)). They should give you the center and at least one point of the circle. Use those points to make x1, x2 and y1,y2. You have then figured the radius out and is simple to put (h,k) in the equation because that is what is the center of the circle is.
@@calebpym7082 bless your soul
I don’t understand he didn’t even do anything with the 49 how am I supposed to get the number of units
Simple asf
You sound exactly like elliot from strength camp on youtube
للأسف يبغالنا نترجم زي هذه المقاطع للعربية
goat.
i actually dont get it, he teaches differently
Bro non of this matters this is a waste of my time and yours none of us will be using any of this in the next 15 years of our lives
who unlikes this? 😒
Me. Idk why but i can't understand anything.
@@gregoryyang8988 It's just Pythagorean theorem.
@@gregoryyang8988 first you have to learn what is the circle equation to understand this video.
me. doesn't explain well at the final answer it was a +3 to me
Me because me nor any of my friends know this and I'm going to fail geometry thanks to khan academy.