ASVAB Math Knowledge Polygons Practice Test 309307

Question 4 of 5
Triangle Geometry

A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.

120°

If angle a = 60° and angle b = 56° what is the length of angle d?

132°
122°
120°
128°