Question

The radius of a circle is 5 kilometers. What is the area?Give the exact answer in simplest form. ___ square kilometers. (pi, fraction)

Answer 1

`25\pi\text{ or 79 square kilometers}`

Step-by-step explanation:

The below formula can be used to determine the area of a circle;

`A=\pi* r^2`

where pi = 3.14

r = radius of the circle = 5km

Let's go ahead and substitute the given into our formula and solve for A;

`A=\pi(5)^2=25\pi=78.5\approx79\text{ square km}`