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The circumference of a circle is 20 cm. What is the approximate radius of the circle?
3.2 cm.
1.5 cm.
7.0 cm.
8.5 cm.
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
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