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Mathematics 13 Online
OpenStudy (anonymous):

two angles are complementary. If one angle measure 42 degrees, what is the measure of the second angle ? A. 138 degrees B. 318 degrees C. 48 degrees D. 84 degrees

OpenStudy (lynfran):

complementary angle adds up to 90 degree so we can form an equation like 42+x=90 solve for x

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