The figure below shows an
equilateral triangle ABC inscribed in a circle O. Circle Q is tangent to
AB, AC, and arc BC at E, F, and D, respectively. S is the area of the
blue lunula and S1 is the area of the yellow circle. Prove that S / S1 = 5
/ 4.
Geometry Problems
Ten problems: 1361-1370
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Triangle
Circle
Equilateral Triangle
Lunula
Areas
Tangent Circles
Circle Tangent Line
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