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Complementary or Supplementary
Angles Two angles are complementary if the sum of their angles equals 90 degrees. If one angle is known, its complementary angle can be found by subtracting the measure of its angle from 90 degrees. Example: What is the complementary angle of 43? Solution: 90 - 43 = 47 |
Two angles are supplementary if the sum of their angles equals 180 degrees. If one angle is known, its supplementary angle can be found by subtracting the measure of its angle from 180 degrees. Example: What is the supplementary angle of 143 degrees? Solution: 180 - 143 = 37 |
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