Vertical angles explained with examples , pictures, an interactive program and a practice quiz.

Free vertical angles theorem math topic guide, including step-by-step examples, free practice questions, teaching tips and more!

You will also be able to identify an example of a vertical angle given a diagram (this guide includes three vertical angles examples and practice problems at the end).

Vertical angles are pairs of opposite angles formed when two lines intersect. Learn the definition, properties, examples, practice problems, and more.

To find the measure of angles in the figure, we use the straight angle property and vertical angle theorem simultaneously. Let us look at some solved examples to understand this.

Example: a° and b° are vertical angles. The interesting thing here is that vertical angles are equal: (in fact they are congruent angles) Have a play with them yourself. Notice how the 4 angles …

Jul 23, 2025 · Two vertical angles have a common vertex, but these vertical angles have no common sides however between various geometric configurations they share the same …

Nov 3, 2025 · Vertical angles are angles opposite one another on two intersecting lines. If you draw an X shape with two intersecting lines, the pairs of angles opposite one another that …

Relationships of various types of paired angles, how to identify vertical angles, what is the vertical angle theorem, how to solve problems involving vertical angles, how to proof vertical angles …

Vertical angles share the same vertex or corner, and are opposite each other. These pair of angles are congruent which means they have the same angle measure. Let’s get familiar with …