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.

Tags

CCSS.HSG.CO.A.1

Front

Do parallel lines cross each other?

Back

No, parallel lines never cross each other.

Tags

CCSS.HSG.CO.A.1

Front

What is a point in geometry?

Back

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

Tags

CCSS.4.G.A.1

Front

What is a ray?

Back

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

Tags

CCSS.4.G.A.1

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Tags

CCSS.HSG.CO.A.1

Front

What are intersecting lines?

Back

Lines that cross each other at one point.

Tags

CCSS.HSG.CO.A.1

Front

What are perpendicular lines?

Back

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

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Tags

CCSS.4.G.A.1

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.

Tags

CCSS.4.G.A.1

Front

What is the definition of an angle?

Back

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