Student Tutorial: Geometry Basics: Other Types of Angles


Learn about adjacent, supplementary, complementary, and vertical angles. For this tutorial you'll be using the Desmos Geometry Tools, which are free: Watch the video and follow along using the Desmos tools.

Click the arrows on the bottom to get started

Math Clip Art: Student Tutorial Title Page

Adjacent Angles. Two non-overlapping angles that share a common side and a common vertex.

Complementary Angles. Angles whose measures add up to 90°. When adjacent, the angles form a right angle.

Supplementary Angles. Angles whose measures add up to 180°. When adjacent, their bases are collinear.

Vertical Angles. Congruent angles formed by intersecting lines, rays, or segments.

Other Types of Angles Title Card

Adjacent angles share a ray.

The measure of the larger angle is the sum of the measures of the adjacent angles.

A right angle is made up of two adjacent angles.

Adjacent angles that make up a right angle are called complementary angles.

Adjacent angles that make up a straight angle are called supplementary angles.

When two lines intersect, four angles are formed.

There are also four pairs of supplementary angles formed.

When two lines intersect, two sets of vertical angles are formed.

Vertical angles are congruent to each other.