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August 24th, 2013, 02:19 PM   #1
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Two equals Sides. One Angle. In a CIRCLE.

Hi, To obtain the area of a a triangle inside a circle with radius 12. and angle pi/3 ( 60deg). A= 1/2 *b*h . = 1/2*12* h

h= tan(30deg)*12 = this is correct> we can intersect pi/3 and use tan to equate the height?

Zen.
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August 24th, 2013, 02:30 PM   #2
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I just imagine a right triangle with angles 30, 60 and 90.
cos(30) = ?3/2 = h/12 i.e. h = 6?3.
? x 12 x 6?3 = 6?3 = 36?3.
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