The circumference of a circle is 20 cm. What is the approximate radius of the circle?

The circumference of a circle is 20 cm. What is the approximate radius of the circle?

Detailed Explanation

The formula for the circumference of a circle is \(C=2 \pi r\). Plug in the given circumference and solve for the radius.

\(C=2 \pi r\)

\(20=2 \pi r\)

\(10= \pi r\)

Use 3.14 as an approximate value for π and divide to solve. Round to the nearest tenth. r = 3.2

\(C=2 \pi r\)

\(20=2 \pi r\)

\(10= \pi r\)

Use 3.14 as an approximate value for π and divide to solve. Round to the nearest tenth. r = 3.2