Let measure angle A equal 40. If angle B complement of angle A, and angle C is a supplemlement of angle B find these measures

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Grade: Education Subject: mathematics
Let measure angle A equal 40. If angle B complement of angle A, and angle C is a supplemlement of angle B find these measures
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Two angles are complementary when they add up to 90 degrees 
m
∠B = 90° - m∠A = 90° - 40° = 50°

Two angles are supplementary when they add up to 180 degrees 
m∠C = 180° - m∠B = 180° - 50° = 130°