Question

Find the radius of a circle whose circumference is 31.4 centimeters. Approximate Π as 3.14.

Answer 1

Circumference is Diameter * 3.14

so D * 3.14 = 31.4

31.4 / 3.14 = 10 so the diameter is 10.

the radius is half of the diameter so radius = 5 centimeters.

Answer 2

(31.4/3.14)/2=5 because π=circumference/diameter