Complementary and supplementary angles

What is a point in geometry?

A point is represented by a dot.

What is a ray?

A ray begins at a point and extends in a given direction.

What is a line segment?

A line segment is part of a line, defined as the shortest distance between two points.

What forms an angle?

An angle is formed by two line segments that begin at the same point.

What is a vertex?

The vertex is where two lines meet.

What are adjacent angles?

Two angles that have a common vertex and a common arm between them.

What is an acute angle?

An angle that is greater than 0 degrees and less than 90 degrees.

What is a right angle?

An angle that is equal to 90 degrees.

What is an obtuse angle?

An angle that is greater than 90 degrees and less than 180 degrees.

What is a straight angle?

An angle that is equal to 180 degrees.

What is a reflex angle?

An angle that is greater than 180 degrees and less than 360 degrees.

What is a revolution?

An angle that is equal to 360 degrees.

What are complementary angles?

Complementary angles add up to 90 degrees.

What are supplementary angles?

Supplementary angles add up to 180 degrees.

What do complementary angles add up to?

90°

What do supplementary angles add up to?

180°

What are adjacent complementary angles?

Angles that share a common vertex and arm.

What are adjacent supplementary angles?

Angles that share a common vertex and arm.

What is the formula for complementary angles?

If angle A is x, then angle B is 90° minus x.

What is the formula for supplementary angles?

If angle C is y, then angle D is 180° minus y.