1//2 x 2 x pi x 18 = 56.57?
3.5 x 2 x pi x 6 = 132
56.57 + 132 + 36 = 224.57? cm
a) It was 224.57 cm. (please use pi from your calculator)
1/6 x pi x 18 x 18 = 54 pi 1/6 Big Circle (or 1/3 Semicircle)
2/3 x pi x 6 x 6 = 24 pi 2/3 Circle (1/2 + 1/6)
54 pi - 24 pi = 30 pi cm2
b) It was 30 pi cm2.
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