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17 March, 14:54

What is the approximate circumference of a semicircle with a radius of 12 centimeters?

18.8 centimeters

37.7 centimeters

75.4 centimeters

150.7 centimeters

+4
Answers (2)
  1. 17 March, 14:59
    0
    Circumference of circle is 2*pi*radius

    so 2*3.1416*12 = 75.4 cm

    circumference of semicircle would be (1/2) (75.4) = 37.7 cm

    answer is 37.7 cm
  2. 17 March, 15:47
    0
    You do Pi*Radius^2

    so 24*Pi=75.4

    then 75.4:2=37.7
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