To find the intersection without a calculator, you would set the two equations equal to each other and solve for x. In this example, you would set -4x + 3 = x - 3. Then once, you get x = 1.2, you would substitute in 1.2 for x in one of the equations to solve for the y-value. (i.e...) y = (1.2) - 3 = 1.8.
Such a clear explanation all the way through. Really helped me to understand what I was doing and why I was doing it. You lost me when you used the calculator. Wish you would have done it by hand, but video was really helpful. Now I'll try to get your final answer using pen and pencil. Thank you!
It's the opposite reciprocal. The product of two perpendicular lines is -1. For example, the product of 2/3 and -3/2 is -1. They are also opposite reciprocals. The product of 1 and -1 is -1.
+Andy Tennyson we are trying to find the equation for the line perpendicular to the side of the triangle. when 2 lines are perpendicular the slopes or opposite reciprocals. which is the fancy way of saying you flip the fraction and change the sign.
you can but it is a little more work because you have to find the y-intercept. You can also use y - y1 = m(x - x1). Use whatever method makes the most sense to you. I hope you do well on your test.
Literally the only reason I clicked on this video was to find how to get the orthocentre coordinates and you fucked over with the calculator. I’m going to fail now
Dude has been helping students for almost a decade. Thanks man!
Thanks man!! this saved me from failing my test my teacher sucks at explaining things
Aquardpanda truee
Jack Hoggatt lol i have my test tomorrow
@@atlasgalor3583 same
my teacher does too.
Jack Hoggatt how did you do on Test
To find the intersection without a calculator, you would set the two equations equal to each other and solve for x. In this example, you would set -4x + 3 = x - 3. Then once, you get x = 1.2, you would substitute in 1.2 for x in one of the equations to solve for the y-value. (i.e...) y = (1.2) - 3 = 1.8.
Geometry with Mr. J -1.8
Oh my thank you so much.
Alternatively you could just graph is by hand, should only take a minute
THANK U SO MUCH
Such a clear explanation all the way through. Really helped me to understand what I was doing and why I was doing it. You lost me when you used the calculator. Wish you would have done it by hand, but video was really helpful. Now I'll try to get your final answer using pen and pencil. Thank you!
Absolute life saver, had my geometry math final tomorrow and had no idea how to do these, Thank you!
My teacher explained this so bad and my midterm is all about this theme, you helped me a whole lot on this
did this man really write "description" as his description?
That's so meta.
Holy shit this dude is in 2040 already
lmao
You are one of the greatest human beings to walk the earth
Thank you Mr. J, this really helped me and my friend in solving our Math Project :)
THIS IS THE BEST EXPLANATIONS I GOT IN WEEKS
thank you Mr. j well explained and very good examples. appericate it.
Thankyou so much. I'm cramming all of this geometry crap or else I'm sure to fail my tests. :(
Narc dad how did your tests go?
@@chasevinhateiro798 lmaoo after 4 years
Is this man using a damn pen to do geometry?
he is a legend
thank you! I struggled to understand the material and this really helped!
Mr. j you are a life saviour
So here’s how you do it
*whips out calculator from the 2200s*
Nicely explained. Thank you for helping me with this.
Please help! :( what if the slope is 0?
I thought the point- slope form was y - y1 = m(x-x1) ?
i like the way you explained it.... especially with y=m(x-h)+k my teacher used another type but it always confused me .... thank you
That’s called the vertex form and not point slope form
this saved my butt on the test omg
thanks dunkey
U heard it too lmao
Lol videogamedunkey
Dat_One_Boi_ bideogamebunkey
That’s not the point slope form that’s the vertex equation. Idk if it’s still right regardless
i feel like im cleaning dust off this comment section
THANK YOU OH MY FREAKING GOSH
Thankyou! This really helped!
are you sure the reciprocal of negative one is one ?
It's the opposite reciprocal. The product of two perpendicular lines is -1. For example, the product of 2/3 and -3/2 is -1. They are also opposite reciprocals. The product of 1 and -1 is -1.
Can use this for any triangle ? Like obtuse or acute triangles ?
+Kendo Akuma yes, it is the same process for any triangle.
Geometry with Mr. J Okay thank you a lot
Yes this video is so helpful
why would you not find the equation of the third side?
+clodagh kenny you can find the third side as a way to check yourself, but you only need two of the lines to find the intersection point.
Why did you flip 1/4 to 4/1?
+Andy Tennyson we are trying to find the equation for the line perpendicular to the side of the triangle. when 2 lines are perpendicular the slopes or opposite reciprocals. which is the fancy way of saying you flip the fraction and change the sign.
helpful, yet i thought y equals mx plus b is slope intercept form
+jonathan Saccocci y=mx+b is the slope-intercept form. I used a "modified" version of the point-slope form.
can you anwser back fast, i have a math test tomorow, is it ok to you y=mx+b instead of y=m(x - h) + k?
you can but it is a little more work because you have to find the y-intercept. You can also use y - y1 = m(x - x1). Use whatever method makes the most sense to you. I hope you do well on your test.
ok, thank you
Literally the only reason I clicked on this video was to find how to get the orthocentre coordinates and you fucked over with the calculator. I’m going to fail now
thanks alot!
That mic kills
thank you so much
HELPFUL THANKS
Thanks bro
Helped so much thx
Mistaaa jaaayyyyy
thx
thank you so much