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  • 19-05-2020
  • Mathematics
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what is the area of a semicircle with a diameter of 21.5

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musiclover10045
musiclover10045 musiclover10045
  • 19-05-2020

Area of a circle = PI x R^2

r = 1/2 diameter

r = 21.5/2

r = 10.75

Area of circle = 3.14 x 10.75^2 = 3.14 x 115.5625 = 362.86625 square units.

A semicircle is half a circle:

Area of semicircle = 362.86625 / 2 = 181.433125 square units (round the answer as needed).

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