Two angles of a triangle measure 42° and 84°. find the measure of the third angle, in degrees. (enter an exact number.)
1 answer:
Let the third angle be x.
Sum of the interior angles of a triangle = 180°
42 + 84 + x = 180
126 + x = 180
x = 180 - 126
x = 54°
Hence, the third angle is 54°.
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