4th Grade Geometry Vocabulary

Front

What is a ray?

Back

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

Front

What are parallel lines?

Back

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

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

What is a point in geometry?

Back

A point is a specific location in space that has no dimension and is usually represented by a small dot.

Front

What is a line segment?

Back

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

Front

What is an angle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is a straight line?

Back

A straight line is a line that extends infinitely in both directions without any curves.

Front

What is a triangle?

Back

A triangle is a polygon with three sides and three angles.

Front

What is a quadrilateral?

Back

A quadrilateral is a polygon with four sides and four angles.