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A flagpole stands on a concrete region, as shown. What is the approximate perimeter of the concrete region? Use 3.14 for π.

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A flagpole stands on a concrete region, as shown. What is the approximate perimeter-example-1
User RatneZ
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The approximate perimeter is 25.12 feet.

The outer edges of the concrete region form semicircles. The perimeter of a circle is called the circumference, and is given by the formula
C=πd

Since these are semicircles, the circumference is given by C=1/2πd.

There are 4 of these semicircles, so the total would be
C=4(1/2)πd

The diameter of each one is 4 feet:
C=4(1/2)(3.14)(4) = 25.12
User Justin AnyhowStep
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