Lines, Rays, Angles

Front

What is a line?

Back

A straight path that extends infinitely in both directions without any endpoints.

Front

What is a ray?

Back

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

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What is a point?

Back

A specific location in space that has no size or dimension.

Front

What is an angle?

Back

A figure formed by two rays that share a common endpoint called the vertex.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What are parallel lines?

Back

Lines that never intersect and are always the same distance apart.