Mr. T's shortened Basic Geometry Vocabulary PLUS

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What symbol represents a line segment?

Back

The symbol for a line segment is represented by a line over the letters, e.g., ̅PQ̅.

Front

What are perpendicular lines?

Back

Perpendicular lines are two lines that intersect to form a right angle (90 degrees).

Front

What is a line segment?

Back

A line segment consists of two endpoints and all the points in between.

Front

What is the difference between parallel lines and perpendicular lines?

Back

Parallel lines never intersect and are always the same distance apart, while perpendicular lines intersect at a right angle.

Front

What does the symbol ↔ represent?

Back

The symbol ↔ represents a line that extends infinitely in both directions.

Front

How can you name a line segment?

Back

A line segment can be named by its endpoints, for example, segment ̅PQ̅ can also be named ̅Q̅P̅.

Front

What are congruent segments?

Back

Congruent segments are line segments that have the same length.

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is the symbol for parallel lines?

Back

The symbol for parallel lines is ||, for example, line AB || line CD.