Example Question - angle equality

Vertical Angles and Angle Equality

The image shows two lines that intersect each other forming an angle of 113°. The other angle labeled "x°" is the vertical angle to the 113° angle. Vertical angles, also known as vertically opposite angles, are pairs of opposite angles made by two intersecting lines. Vertical angles are always equal to one another. Thus, the angle marked "x°" is also equal to 113°.