Area of a circle

Area of a circle and how it relates to radius and diameter

[itzelluna]

"It doesn't look like a perfect circle, but we can use our imaginations" 😂😂😂😂

[codebattleseraph]

For me, I believe that this is more like a review than anything because if you are a complete beginner then there is a high chance that you don't understand like 90% of the video. If you are currently being taught geometry area then this is completely useful as a review if you dont understand it. This is because you probably already know the orgins of pi and the formula, but dont actually know how to find the area.
Btw, thanks Mr.Khan, the video was useful.

[dorkky]

In 6 minutes. I understand better than what my teacher taught from 2 weeks

[dorinemorris]

Best teacher ever:)
I understand everything he teaches!:)

[TheGreatAvocado]

Thank you so much, I have a final exam tomorrow, thank the lord for you!

[Itisheylel]

Thankyou Mr. Khan it's very helpful and it made me recall what I learned when I was just in elementary.

[ppatel]

Khanaacademy ur the best what i see....

[saifalzarooni]

It is too hard to under stand explain one thing instead of jumping around.

[camilletorres]

Thanks so much! I got 97% in my Math :)

[htaycho]

wow i was four when this was made and now i need it for my geometry class

[alicitatrujillo]

HAHA...I still don't understand..0-0

[omar]

I listened to my teacher I didn’t understand anything then I watched this video and as usual I got the formula

[NarutoAlive]

this is what i needed he explains so well and he is well educated i trust that this is the correct method

[stevencunningham]

Doing middleschool homework pa I just need a refreshment

[carlyegruss]

Thank you! I finally finished my math homework!!! :)

[dumbunny]

My suggestion: By definition, c = 2*pi*r. Examine regular N-sided inscribed polygons / circumscribed polygons: they are composed of N triangles, and the ratios of the areas of the polygons to their perimeters appear to converge to r / 2 as N goes to infinity. Try to prove the perimeters P(N) converge to c and the ratios R(N) converge to r / 2. For the latter, examine the region between the inscribed and circumscribed polygons and use the Pythagorean theorem.

[Cascaderade]

@lightdraw The formula for the area of a circle can be derived by integrating the equation of a circle using the methods of calculus. It is very complicated for some people to understand and requires advanced integration techniques, which is why the formula is generally accepted and rarely explained.

[udayjadhav]

Thank you very much. It is just empowering.

[slidyslide_btw]

I used to watch and solve the website questions so much.

[DevTii]

Man, way easier than i thought! Thanks!