Basic Geometry Definitions

Front

What is a location in space that is represented by a dot and has no dimensions?

Back

Point

Front

What is part of a line that begins with a point and extends forever in one direction?

Back

Ray

Front

What do you call two rays that share a common endpoint?

Back

Angle

Front

What is the term for a flat surface that extends infinitely in all directions?

Back

Plane

Front

What is a straight path made up of an infinite number of points that continues forever in both directions?

Back

Line

Front

What is the term for a part of a line that has two endpoints?

Back

Line Segment

Front

What is the point where two lines intersect called?

Back

Vertex

Front

What is the term for an angle that measures less than 90 degrees?

Back

Acute Angle

Front

What do you call an angle that measures exactly 90 degrees?

Back

Right Angle

Front

What is an angle that measures more than 90 degrees but less than 180 degrees?

Back

Obtuse Angle