Question

The radius of a circle is 10 centimeters. What is the area?Give the exact answer in simplest form. _____ square centimeters (pi, fraction)

Answer 1

The radius of the circle can be computed using the equation

$A=\pi r^2$

The radius of the circle is provided in the problem, which is 10 cm. Just plug it in on the equation above and compute, we get

$A=\pi(10cm)^2=100\pi cm^2$

The exact answer is 100π square centimeters.