Why is the lateral area of a cone is pi*r*sqrt(r^2+h^2)?
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I know I have to use Pythagorean theorem but what do I do with (x-4)^2? Reddit 9th grade geometry
17:08
Why is pi here? And why is it squared? A geometric answer to the Basel problem
7:47
Can we have a rectangle with perimeter = 1000 cm but area = 1 cm^2?
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Gabriel's Horn paradox (finite volume but infinite surface area)
13:56
Lateral Area and Surface Area of Cones, Pyramids, Cylinders & Prisms
21:05
Why is there no equation for the perimeter of an ellipse‽
5:04
What is the area of the square? They did the math but did you? Reddit geometry r/theydidthemath
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