Volume of a Cone | MathHelp.com

This lesson covers the volume of a cone. Students learn that the formula for the volume of a cylinder is pi times radius squared times height, so the volume of a cylinder that has a radius of 10 feet and a height of 40 feet is pi times 10 squared times 40, or pi times 100 times 40, or 4000 pi cubic feet. And since pi = 3.14, 4000 pi cubic feet can also be written as 4000 times 3.14, or 12,560 cubic feet. Students also learn that the formula for the volume of a sphere is 4/3 times pi times radius cubed, and the formula for the volume of a cone is 1/3 times pi times radius squared times height.

[bumblebeesoundwave]

When you’re looking this up for homework and start scrolling down at the comments

[dansko]

When YouTube is better than your actual teacher



(edit) i came back, i forgot i had this. and 630 LIKESSSS

[meksaykids]

this lady has no idea how much she’s helping me pass pre algebra this year

[bokutowifuuwu]

How does she explain it better in such a short amount of time then my teacher who has a whole hour to do it 😭

[meksaykids]

i’ve tried to pay attention to my teacher and different videos but this is the only lady that makes it make sense. for some reason she’s the only person i can pay attention to this year. and she has noooo idea how much she’s helping me pass pre algebra this year so thx for making this video... five years ago.

[ncloesunshine]

Did anyone else realize how huge that whiteboard is? 😂😂

[PeterParker-mozd]

When Mr. Stark quizzes you about the volume of a cone and you have to look this crap up again...

[hellothere]

Why did she look so depressed all video long, until the last 2 seconds when she gave her sinister smile 😂

[Naiobia]

I literally hate when they put fractions in formulas how are we supposed to incorporate that

[alanacidmyer]

stop looking at the comments you need to focus
you're welcome

[reyesjrjesus]

Another way to solve this is instead of multiplying 1/3 by the equation, you could just solve the equation the way you usually do; and then divide the whole thing by 3. For example 3.14 * r2 * h = answer divide by 3. This makes sense because a cone is a third of a cylinder. What I mean by this is a the total volume of a cone takes approximately 1/3 of the space a cylinder does. Good luck! and hopefully this will help

[aksel]

She looks depressed and annoyed about her job.

[wuggybuggy]

When you have to watch cause of quarantine, but think it’s all going good until that smile at the end 😔😳

[avocadoeater]

the smile at the end will keep me up at night😨

[husband-of-chinggis]

sis looks about as happy to be here as we are 😭

[jk-nqbf]

Bro if my teacher was her, I would definitely pay attention to class.

[MsBajanSensation]

Lol that smile at the end lol 😂 showing us the long ass route!!!🙄

[quilviotioschotborgh]

Cross cancel is like dividing, to the ones who don’t know.

[kehmarSha]

hey quarentine buddies, hope your doing well in class. math is hard without a teacher but dont give up. because sadly this quarter grade still counts 😞

[andygarcia]

EXPLAIN THE “cross cancel” PART! Lol like how does that even happen??