Problem

52. What is the area of a circular enclosure that uses 312 meters of fencing?
(a) \( 7746.4 \mathrm{~m}^{2} \)
(b) \( 30,985.6 \mathrm{~m}^{2} \)
(c) \( 6084 \mathrm{~m}^{2} \)
(d) \( 305,815.2 \mathrm{~m}^{2} \)

Answer

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Answer

A = \(\pi r^2\)

Steps

Step 1 ：C = 312

Step 2 ：r = \(\frac{C}{2\pi}\)

Step 3 ：A = \(\pi r^2\)

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