Basic Geometry Definitions

Front

What is an angle?

Back

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

Front

What is a ray?

Back

A ray is a part of a line that begins at a point and extends infinitely in one direction.

Front

What is a line?

Back

A line is a collection of points that extends infinitely in both directions.

Front

What are perpendicular lines?

Back

Perpendicular lines are two coplanar lines that intersect to form four right angles.

Front

What is a segment?

Back

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

Front

What is a point in geometry?

Back

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

Front

What is a plane?

Back

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

Front

What are parallel lines?

Back

Parallel lines are lines in the same plane that never intersect and are always the same distance apart.

Front

What is a vertex?

Back

A vertex is the common endpoint of two rays that form an angle.

Front

What is the difference between a line and a line segment?

Back

A line extends infinitely in both directions, while a line segment has two endpoints.