fatstarrlouise fatstarrlouise

11-05-2018
Mathematics

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Suppose angle A is complementary to angle B, and angle B is supplementary to angle C. If measure of angle A is 21 degree, find measure of angle C.

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MrGumby MrGumby

17-05-2018

C = 111 degrees

Since A and B are complementary they add to 90. So we know that B must be 69 degrees.

Since B and C are supplementary they add to 180. So we know that C must be 111.

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