Question

The circumference of a circle is 22π in. What is the area, in square inches? Express your answer in terms of π

Answer 1

A = 121 pi in^2

Explanation:

The circumference is given by

C = 2 * pi*r

22 pi = 2 * pi *r

Divide each side by 2 pi

22 pi / (2 pi) = 2 pi r / (2pi)

11 = r

Now find the area

A = pi r^2

A = pi (11)^2

A = 121 pi in^2