markosheehan Posted October 16, 2016 Share Posted October 16, 2016 hi can someone help me work this out. i think it has something to do with the exterior angle of a triangle is equal to the sum of the interior angles but i cant work it. Link to comment Share on other sites More sharing options...
Sriman Dutta Posted October 16, 2016 Share Posted October 16, 2016 Do you know the intersecting chord and tangent properties of circle? Hint : ang. TAB is bisected by AC. And in a circle the angle between the tangent and a chord is equal to the angle at the remaining segment. Link to comment Share on other sites More sharing options...
markosheehan Posted October 16, 2016 Author Share Posted October 16, 2016 i know that it means the red angle and the blue angle are the same but i dont know where to go from there Link to comment Share on other sites More sharing options...
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