Problem 655

Sir SagarApril 23, 20150

What is the formula for the circumference C of a circle of radius r? What is the formula for area A of a circle of radius?

Solution:-

The formula for the circumference C of a circle of radius r is C = 2 $\pi$ r.

The formula for the area A of a circle of radius r is A = $\pi r^{2}$

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