Two angles angle, one and angle two in a diagram are supplementary at an angle one equals 77°. What equation can you write to solve for an angle to and an angle two equals X would it be X +77 equals 90° X equals 90° -77° or X equals 77° or X +77° equals 180°.
The equation that can be written to solve for angle two (X) is X + 77° = 180°. This is because in a supplementary pair of angles, the sum of their measures is 180°.
