C = 2 r pi
20 pi = 2 r pi Divide both sides by 2 pi
10 = r
r = 10
A = r ^ 2 pi
A = 10 ^ 2 pi
A = 100 pi
A / 2 = 100 / 2 = 50 pi
The circumference of a circle = 20 pi. If the circle is cut in half, what is the area of one of the resultant halves ?
please answer and explain
1 answer
1 answer