how do you find angle values in obtuse triangles?

Question

If an obtuse triangle has 2 15 degree angles how do you find the value of the third angle?

Answer 1

Sometimes, a problem statement contains unnecessary informatioin to distract you. ALL triangles have one property in common: the sum of the angles is always 180 degrees. You are given two of the angles; it is simply a matter of subracting those from 180. What is left is the third angle.

180 - 15 -15 = 150 degrees