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Geometry
Angles
Supplementary angles
Angles a and b are supplementary angles. What is the value of m∠a if m∠b=43° ?(1 point)
1 answer
The sum of supplementary angles is 180 degrees. Therefore, if angle b is 43 degrees, then angle a must be 180 degrees minus 43 degrees, or 137 degrees. Therefore, the value of m∠a is 137°.
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