The value of y is found using the exterior angle theorem. This means that the two angles inside the triangle that are not next to the outlier angle are, when added together, equal to the outlier angle. Note that the two inside angles are congruent, being y.
Set 2y equaled to 88
2y = 88
Isolate the y. Divide 2 from both sides
2y/2 = 88/2
y = 88/2
Simplify
y = 44
C) 44 degrees is your answer
hope this helps
