Question

The Area of a circle is 4 pi in^2. What is the circumference, in inches? Express your answer in terms of pi.

Answer 1

Explanation:

pi r 2 = 4 pi ^2

then r^2 =4pi

r =2√pi

now circumference of circle = 2pi r

= 2pi 2√pi

= 4 pi √pi

4pi ^2 by √pi