The exterior angle theorem states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.
If we let one of the interior angles be 37 degrees, then the other interior angle would be 180 - 37 = 143 degrees.
The exterior angle would be the sum of these two angles, which is 37 + 143 = 180 degrees.
What is the measure of the exterior angle 37 = 42
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