Given:1 is complementary to 2. 2 is complementary to 3.Prove:m1 = m3





Angle B measures 60°. What is the measure of the angle that is complementary to angle B?
Angles 1 and 2 form a right angle.

Right angle FCD intersects and at point C. FCE is congruent to ECD. ECD is complementary to DCB.

Rectangle QRST is shown. Angle QRT is congruent to angle STR, and angle STR is complementary to angle QTR.

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