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trigonometry application
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片考：http://imgcld.yimg.com/8/n/HA07819878/o/701109050058213873453830.jpg A cow is tethered by a 100-ft rope to the inside corner of an L-shaped building, as shown in the figure. Find the area that the cow can graze. (Round your answer to the nearest whole number.) Assume a = 30 ft, b = 60 ft, c = 100 ft, d =... 示更多 片考：http://imgcld.yimg.com/8/n/HA07819878/o/701109050058213873453830.jpg A cow is tethered by a 100-ft rope to the inside corner of an L-shaped building, as shown in the figure. Find the area that the cow can graze. (Round your answer to the nearest whole number.) Assume a = 30 ft, b = 60 ft, c = 100 ft, d = 70 ft, e = 40 ft.
最佳解答:
The area consists of 4 sections of quarter of a circle with radii: c = 100 ft c - d = 30 ft c - b = 40 ft c - b - a = 10 ft With total area: (π/4) (1002 + 302 + 402 + 102) = 3150π ft2 2011-09-06 15:50:40 充： It is not letter "n". It is π (周率) indeed. Circle area = πr^2
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what does "n" represent?CF546184287637C5
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