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Find the area of a semi-circle with a radius of 12in. Round to the nearest tenth

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Step-by-step explanation:

The area of a circle with radius r is:


A_{\text{circle}}=\pi\cdot r^2

The area of a semicircle is half the area of a cricle:


A_{\text{semicircle}}=\frac{A_{\text{circle}}}{2}=(\pi)/(2)\cdot r^2

This semicircle has a radius of 12in, the area is:


A=(\pi)/(2)\cdot12^2in^2=(\pi\cdot144)/(2)in^2=72\pi in^2=226.19467in^2

Answer:

The area of the semicircle is 226.2 in²

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