Conical Volume (1 of 2: Derivation of the Volume of a Cone through Solids of Revolution)

[stephenkary]

Looked for exactly this video for half an hour. Thank you!

[GretgorPooper]

I love how charismatic he is, I wish I had had a math teacher like him in high school. I still did quite well for myself, all things considered, but I'd have loved math even more if he was my teacher.

[oliverdowning]

I’m meeting this in year 8, two years after learning the equation and understanding why it’s like that. Thank you for explaining to me how it works. I could not get my head around why it was not half of the cylinder and it did not help that my maths teacher didn’t know the solution and tried to say from the side it’s one of three sections when everyone knows that a triangle is half of the rectangle it is within. Thank you for teaching me the correct answer.

[alvinparrenas]

Preparing for my licensure exam and went here.
Eddie woo the best math teacher

[aryandivyanshu]

Eddie Woo is the name of last ray of hope after whole internet gives up.

[Tefans]

Excellent! I had gotten close but couldn't quite crack it, now I can go sleep in peace.

[jillsingleton]

Nice one! I had just explained the volume of a sphere proof and my class asked to watch your proof of the volume of the cone.

[physicsboi]

After all this time Eddie was a Harry potter fan?


'Always'

[gasdive]

Thanks! I was thinking a cylinder is a rectangle rotated and it was driving me crazy trying to figure out why you could cut that rectangle in half diagonally, then rotate it and sweep a volume a third rather than a half.

[gladoseus]

lisede şöyle anlatabilen bir hocam olsaydı cok daha iyi yerlerde olabilirdim ülkemizdeki çoğu gencin de durumu benim gibi. işini sevmeyen ve bilmeyen öğretmenlerin elinde vakitleri harcandi.

[Anonsss]

Boy am I here too early, he's saying words I've never heard : gradient? Naught?

[DanChanHy]

He said, 'super super easy to deal with' and I'm like what.

[chanm]

I mean... I watched the video. I understood what he said... but in my head I'm still trying to put 3 cones together so that they make the shape of a cylinder tho. 😂

[alvanashir]

this formula can be develop from area of sphere 4πr²
vol of cone=1/3.r.4πr²=4/3πr³

[DazHuang]

Sir, I got wrong results when I did it using y=-r/hx+r
Shouldn't we get same result?

[ne]

excellent, I am curious about your age?

[عطاالدهامشة-عح]

if xy=2, rotate about y=-x from x=√2 to 2 find volume

[sephiroththephoenix]

Why is only one pi used? Shouldn't it be 2pi for a full rotation?

[vvkhari]

why is he taking the volume of the cylinder inside the integral. To be more specific, why should I integrate [pi.r^2.h] from 0 to h. Can someone please explain?

[dhanvant.p.s]

Why can't we calculate the volume by, circumference of the base × area of the right angle triangle = 2πr × rh/2, pls help me