Geometry Vocabulary

Front

An angle is defined as two rays that share the same _____

Back

vertex

Front

Points, Lines and Planes are the _________ of Geometry.

Back

Undefined terms

Front

Angles are defined by their measurement. Obtuse angles are angles that are ____

Back

between 90° and 180°

Front

Lines, line segments and rays are known for their number of endpoints. Lines have ____ endpoints, line segments have ____ endpoints and rays have ____ endpoints.

Back

lines - zero, line segments - 2, rays - 1

Front

The shortest distance between two points is ____

Back

a straight line

Front

What is a point in geometry?

Back

A point is a location in space that has no size or dimension.

Front

What is a line in geometry?

Back

A line is a straight one-dimensional figure that extends infinitely in both directions.

Front

What is a line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

What is a ray?

Back

A ray is a part of a line that has one endpoint and extends infinitely in one direction.

Front

What is a plane in geometry?

Back

A plane is a flat two-dimensional surface that extends infinitely in all directions.