4th Grade Geometry Vocabulary

Front

What are parallel lines?

Back

Lines that lie in the same plane, never intersect, and are always the same distance apart.

Front

Do parallel lines cross each other?

Back

No, parallel lines never cross each other.

Front

What is a point in geometry?

Back

A point is a single dot that represents a location in space.

Front

What is a ray?

Back

A part of a line that begins at one endpoint and continues without end in one direction.

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What are intersecting lines?

Back

Lines that cross each other at one point.

Front

What are perpendicular lines?

Back

Lines that intersect to form right angles (90 degrees).

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

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.

Front

What is the definition of an angle?

Back

An angle is formed by two rays that share a common endpoint.