Question

The diameter of a circle is 20 meters . What is the area ?

Answer 1

40m

Explanation:

if 20 it the diameter then the daius is 10 which is multiplied by 4

Answer 2

100pi m or approximately 314 m^2

Explanation:

We need to find the radius to find the area

r = d/2 = 20/2 = 10

The area of a circle is

A = pi r^2

A = pi (10)^2

A = 100 pi m^2

If we approximate pi by 3.14

A = 100*3.14

A = 314 m^2