Question

A circular sprinkler system is installed and waters an area of 78.5 square yards. What is the radius of the circle? Draw a picture and show all your work.

Answer 1

The radius of the circle is about 5

Explanation:

The formula for the radius of the circle with a area is:

- R= the square root of the area divide by pi ( π)

or - R= the square root of A/ π

Plug in 78.5 into the formula

then you get the radius which is 5.

(you might need a calculator for this)