In the scenario where two lines intersect creating angles 1, 2, 3, and 4, the vertical angles are Angle 1 and Angle 4, and Angle 2 and Angle 3. These pairs of angles are equal in measure and directly opposite each other.
Vertical angles are pairs of opposite angles made by two intersecting lines. In the given scenario with two lines intersecting and creating angles 1, 2, 3, and 4, there are two pairs of vertical angles. The vertical angles are:
Angle 1 and Angle 4
Angle 2 and Angle 3
Angles 1 and 4 are opposite to each other, and so are angles 2 and 3. By definition, vertical angles are equal in measure and are formed by the intersection of two lines.