If the perimeter of the semicircle is 10.28mm. What is the semicircles radius?
1 answer:
The formula for a circle’s circumference (circle’s unique perimeter) is pi * diameter. However, since we have a semicircle (half of the circle), our formula would 1/2 * pi * diameter, or just pi * radius. Set up an equation and solve. 10.28 = pi * radius. r = (10.28)/pi
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