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How do i find the perimeter of a semi circle with an 18 cm base ?

April 26, 2017base Circle CM Education help homework perimeter Reference semi

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How do i find the perimeter of a semi circle with an 18 cm base ?

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If the base is 18 cm, then the diameter of the semi-circle is 18. The perimeter is half a circle plus 18, or (1/2)pi(18) + 18 9pi + 18 cm or approx. 46.274 cm Be careful, you need to include the base segment as part of your perimeter. The other answers are only including the length of the half-circle.