Verify by integration that the perimeter of a circle is 2 (pi) r

Описание к видео Verify by integration that the perimeter of a circle is 2 (pi) r

In this video, I showed how to prove that the perimeter of a circle is 2(pi)r by using the arclength formula for a quarter circle. Although the definition of pi is the ratio of the perimeter to the diameter, this is a good exercise for calculus students. It also shows that the arclength formula as derived in calculus is valid.

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