I have a triangle (not right angled) in a circle. I know all the sides but none of the angles. Is there a formula to find an angle? I need to know the one at the centre of the circle. Thanks.
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Originally Posted by GAdams I have a triangle (not right angled) in a circle. I know all the sides but none of the angles. Is there a formula to find an angle? I need to know the one at the centre of the circle. Thanks. Is this an actual triangle or a wedge (sector) of the circle? -Dan
Originally Posted by topsquark Is this an actual triangle or a wedge (sector) of the circle? -Dan Its a triangle in a circle. O is the centre, A and B are points on the circumference. AB is a chord. Sides OA = 3cm = OB. And AB is 4cm.
Originally Posted by GAdams Its a triangle in a circle. O is the centre, A and B are points on the circumference. AB is a chord. Sides OA = 3cm = OB. And AB is 4cm. The use the Law of Cosines or the Law of Sines to find your angles. -Dan
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