Points, Lines, Line Segments, Rays, and Angles

Front

What is a point?

Back

A point is an exact location in space with no size or dimension.

Front

What is a line?

Back

A line is a straight path of points that goes on and on in two directions.

Front

What is a line segment?

Back

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

Front

What is a ray?

Back

A ray is a part of a line that has one endpoint and goes on endlessly in one direction.

Front

What is an angle?

Back

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

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

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

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.

Front

How do you identify an acute angle?

Back

An acute angle can be identified as being smaller than a right angle (90 degrees).