Question

Two angles of a triangle measure 42° and 84°. find the measure of the third angle, in degrees. (enter an exact number.)

Answer 1

The answer is 56° your very welcome I needed this to be 20 characters so yeah

Answer 2

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°.