Best answer gets in the figure below, angle y and angle x form vertical angles. angle x forms a straight line with the 50° angle and the 40° angle. write and solve an equation to determine the measure of angle y.

The answer is 90 degrees. Angle x and angle y form vertical angles, therefore x = y. Angle y forms a straight line with the 40° angle and the 50° angle which means that 50° + 40° + y = 180°. 90° + y = 180°. y = 180° - 90°. y = 90°. As mentioned earlier: x = y, so x = y = 90°.