Asked by sasa
An oblique isosceles triangle inscribed in a circle. If one side of the triangle has a length of 10 cm and the angle subtended by the side is 15 deg, determine the area of the circle.
Answers
Answered by
oobleck
If the base is 10, then
a = 2(1/2 * 5*5cos(15/2)°) = 25 cos7.5°
If one of the two equal sides is 10, then
a = 2(1/2 * 10 cos15° * 10 sin15°) = 100 sin30°
a = 2(1/2 * 5*5cos(15/2)°) = 25 cos7.5°
If one of the two equal sides is 10, then
a = 2(1/2 * 10 cos15° * 10 sin15°) = 100 sin30°
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