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Area of Sector

A window in t...

Question

A window in the shape of a semicircle has a radius of $20 c m$ . Find the area of the semicircle.

A

128 c m

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B

428 c m

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C

628 c m

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D

290 c m

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Solution

The correct option is C $628 c m$
Area of a semicircle $= \frac{1}{2} π r^{2}$
$= \frac{1}{2} π (20)^{2}$
$= 628 c m^{2}$

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