Question

The radius of a semicircle is 3 centimeters. What is the semicircle's area?

Answer 1

`A = (9)/(2) \pi\ cm^(2)`

Explanation:

Area of a full circle is
`r^(2) \pi`.

Area of a semicircle is exactly half of it:
`(1)/(2) r^(2) \pi`.

`A = (1)/(2) 3^(2) \pi = (9)/(2) \pi = 14.137\ cm^(2)`