My Math Forum Two equals Sides. One Angle. In a CIRCLE.

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 August 24th, 2013, 01:19 PM #1 Member   Joined: Aug 2013 Posts: 69 Thanks: 0 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.
 August 24th, 2013, 01:30 PM #2 Member   Joined: Aug 2013 Posts: 59 Thanks: 0 I just imagine a right triangle with angles 30°, 60° and 90°. cos(30°) = ?3/2 = h/12 i.e. h = 6?3. ? ½ x 12 x 6?3 = 6²?3 = 36?3.

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