Now that WWE is coming to an end, Howard is building a wrestling area in his backyard to become the new wrestling craze. If the diameter of his circular arena is 20 ft, how many feet of fence does he need to make the border of the ring?


To find the length of the fence to circle the arena, you need to compute for its circumference. The formula for circumference is:
\(\mathrm{C}=\pi \times diameter \)

\(C=3.14 \times 20=62.8\)feet
TIP: For a quick estimate, you can use pi = 3. In this problem, the answers given in the choices are quite far apart in value, so estimating will work fine. \(C=3 \times 20=60\), the closest number to 62.80 feet.

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