Basic Geometry Terms

Front

What is a Plane?

Back

A two-dimensional surface that extends infinitely in all directions, having no edges.

Front

What is a Ray?

Back

A part of a line that starts at a point (called an endpoint) and extends infinitely in one direction.

Front

What is an Obtuse Angle?

Back

An angle that measures more than 90° but less than 180°.

Front

What is a Point?

Back

A location in space that has no dimensions and is represented by a dot.

Front

What is Distance in geometry?

Back

The absolute value of the difference of the coordinates of two points.

Front

What is a Line Segment?

Back

A part of a line that has two endpoints.

Front

What is an Acute Angle?

Back

An angle that measures less than 90°.

Front

What is a Right Angle?

Back

An angle that measures exactly 90°.

Front

What is a Straight Angle?

Back

An angle that measures exactly 180°.

Front

What is a Bisector?

Back

A line or segment that divides an angle or a line segment into two equal parts.