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28 November, 19:51

What is the approximate perimeter of a semicircle with a radius of 9mm?

Use pi as 3.14.

Express your final answer to the nearest hundredth.

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Answers (1)
  1. 28 November, 20:14
    0
    Act like it's a whole circle and find the perimeter, then divide by 2.

    P = 2 * pi * r

    P = 2 * 3.14 * 9

    P = 56.52

    Now divide by 2:

    P = 28.26
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