Answer:
37.68 feet
Step-by-step explanation:
The circumference formula is:
C = 2 × pi × radius
or
C = diameter × pi
Both the formulas are the same thing. If you multiply the radius by two, you get the diameter. That is why they are the same.
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Now, plug in the diameter in the second formula because, it is more convenient. You can use the first formula and still get the same answer.
C = 12 × 3.14
pi is approximately to 3.14. Unless told so otherwise, use 3.14 as pi. The most accurate fraction form is 22/7 but, 3.14 is more accurate.
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Now, solve:
C = 37.68 feet
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Note that the term circumference means perimeter when it comes to circles, semicircles, etc.
