What type of angles do the pairs of exterior angles of a triangle form?
complementary
supplementary
vertical
obtuse

Exterior angle of a triangle is defined as the angle formed on one side of a triangle and when the adjacent side of the triangle is extended. Thus, there is only two angles form or legit to be called a pair of exterior angles. The said angles are located opposite of each and having the same value. They are also known as Vertical Angles.

1. 5/82.95% is better than 7/8