4th Grade Geometry Vocab

Front

What are lines that never cross or meet and are the same distance apart?

Back

Parallel lines are lines that never cross or meet and are always the same distance apart.

Front

What has two rays with a common endpoint?

Back

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

Front

What are lines that cross or meet to form a right angle?

Back

Perpendicular lines are lines that intersect to form a right angle.

Front

What is formed by two rays that have a common endpoint?

Back

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

Front

What is a straight path that extends infinitely in both directions?

Back

A line is a straight path that extends infinitely in both directions.

Front

What is a part of a line that has a fixed starting point and extends infinitely in one direction?

Back

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

Front

What is a part of a line that has two endpoints?

Back

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

Front

What is the point where two lines meet?

Back

The intersection is the point where two lines cross or meet.

Front

What is the measure of the space between two rays that share a common endpoint?

Back

The measure of the space between two rays is called the angle.

Front

What do you call a straight line that divides an angle into two equal parts?

Back

An angle bisector is a line that divides an angle into two equal parts.