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* Round Silo Let's break out the triangle separately so we can get a good look at it. 


Since the final triangle in this case
is isoceles my initial approach was to calculate the altitude and
solve by Pythagoras, but later published problems resulted in final
scalene triangles where the altitude was not as easily found. I
realized that I did not even need the altitude. Everything is
determined by the sides, which we know. Here's how to do it:
Find angles by the Law of Cosines Quadrilateral: Angle of wedge = expected rotation of radius to reach base of
triangle minus Angle A so total grazing area = 3/4 of a 50 ft. circle 