Question

Find the area of a circle with a diameter of 4 . Either enter an exact answer in terms of use 3.14 3enter your answer as a decimal.

Answer 1

4pi

Explanation:

The area of a circle is given by

A = pi r^2

where r is the radius

The radius of a circle is found by

r =d/2 where d is the diameter

r = 4/2 = 2

So A = pi (2)^2

pi (4)

4pi