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