Homework Help: geometry

Posted by Alka on Tuesday, January 11, 2011 at 7:18am.

the three angles of a triangle are represented by 13 x/3,7x/3,5x/6.find the measure of its obtus angle.

geometry - Reiny, Tuesday, January 11, 2011 at 8:54am
13x/3 + 7x/3 + 5x/6 = 180

multiply each term by 6
26x + 14x + 5x = 1080

solve for x, sub its value into 13x/3

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