Question

if ∠acd and ∠bce are complementary angles, then m∠acd + m∠bce = 90°. which reason justifies the statement? complement theorem definition of right angle vertical angles theorem definition of complementary angles

Explanation:

Complementary angles are defined as two angles whose sum is 90 degrees. Since ∠ACD and ∠BCE are said to be complementary, the sum of their measures being 90 degrees follows directly from the definition of complementary angles.

Answer:

Definition of Complementary Angles