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

Mathematics

1 answer:

topjm [15]3 years ago

6 0

Answer:

$A = \frac{9}{2} \pi\ cm^{2}$

Step-by-step explanation:

Area of a full circle is $r^{2} \pi$ .

Area of a semicircle is exactly half of it: $\frac{1}{2} r^{2} \pi$ .

$A = \frac{1}{2} 3^{2} \pi = \frac{9}{2} \pi = 14.137\ cm^{2}$

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