1. In the figure, angle A is an exterior angle to triangle BCD.(a) Explain why angle A is equal to the sum of the measures of the two nonadjacent interior angles. Show your work. (b) What is the measure of angle A? Angle B? Show your work.
Accepted Solution
A:
Comment It has to do with supplementary angles. Supplementary angles add up to 180o A triangle has angles that always add up to 180o