contestada

Lamar wanted to explain why the measure of angle 5 is equal to the sum of the measures of angles 1 and 3. Which geometry concepts should be used in Lamar’s work?
A. supplementary angles and the sum of the measures of interior angles of a triangle
B. complementary angles and the sum of the measures of interior angles of a triangle
C. supplementary angles and vertical angles
D. the sum of the measures of interior angles of a triangle and vertical angles