Question

Find the area of a circle with a diameter of 4.

Either enter an exact answer in terms of at or use 3.14 for and enter your answer as a decimal.

Answer 1

Area of a circle = PI x r^2, where r is the radius of the circle. The radius is half the diameter.

Radius = 4/2 = 2

Area = PI x 2^2

Area = 4π