Question

Find the area of a circle with a circumference of 31.42 centimeters.

Answer 1

c = 2(pi)r = 31.42cm

2(3.14)r = 31.42cm

6.28r = 31.42cm

r = 31.42cm / 6.28

r = 5cm

A = (pi)r^2

= (3.14) (5)^2

5x5 = 25cm

25x3.14= 78.5cm

the area equals 78.5cm

Answer 2

A≈78.56cm²

Hope this helps you out!