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21 February, 18:33

The perimeter of a semicircle is 20.56 yards. What is the semicircle's radius?

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  1. 21 February, 20:56
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    Step-by-step explanation:

    Perimeter = 20.56mm

    Given the perimeter, find the diameter

    = 20.56

    D = 20.56:

    D = 6.54 mm

    Perimeter of the Semicircle = half the circle arc + the straight line (Diameter)

    Semicircle = 0.5 (20.56) + 6.54cm

    Semicircle = 16.83mm
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