Ind the area of a circle whose circumference is 31.4 centimeters. Approximate Π as 3.14.

31.4/3.14=10

10/2=5

5*5*3.14 = 78.5 cm square

The circumference of a circle is found by 2 (pi) •r. To find r, set this equal to the circumference they gave you.

31.4=2pi•r

Divide by 2pi

r=4.997

The area of a circle is given by pi•r^2

A=pi (4.997) ^2

A=78.460 cm^2