Question

How do i solve this?

Answer 1

The sum of angle measures inside a triangle equals 180°. Subtract 180-135 to find the measure of angle a. 180-135=45. Then add 45 and 58 to get 103. Then you subtract 103 from 180 to get an answer of 77.

Answer 2

First, find the supplementary angle of angle A. Together, they should add up to 180°, which is a straight line.

123°+y°=180°

y°= 180°-123°

y°=57°

The interior angles of a triangle add up to 180°.

58°+57°+x°=180°

115°+x°=180°

x°=65°

The measure of angle x is 65°.