Add those two angles.  Then subtract what you get from 180°  

RELATED QUESTIONS

In a triangle the measure of the second angle is 30 degrees more than the measure of the... (answered by TimothyLamb)

The second angle of a triangular garden is four times as large as the first. The third... (answered by josgarithmetic)

In a triangle, the measure of the second angle is twice the measure of the first angle.... (answered by Mathtut)

In a regular polygon each interior angle is 140 degrees greater than each exterior angle.  (answered by savvyhush23)

calculate the largest angle of a triangle in which one angle is eight times each other
 (answered by Theo)

I could really use some help.  For two angles, angle ABC and angle DBC, m(angle)ABC=30... (answered by Theo)

Calculate the answers in the following

1) - | | 30 + (-11) | + (-17) |
 
 (answered by jim_thompson5910)

calculate the angle of an isosceles triangle in which each base angle is four times the... (answered by josmiceli)

In a triangle, one angle is three times the measure of the second angle. The
third angle  (answered by stanbon)