Front

What is a right angle?

Back

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

Front

What is a line?

Back

A line is straight and extends in both directions forever.

Front

What do perpendicular lines do?

Back

Perpendicular lines intersect to form right angles.

Front

What is a point?

Back

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

Front

What are parallel lines?

Back

Parallel lines are lines that never intersect and are always the same distance apart.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 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 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 extends infinitely in one direction.

Front

How do you identify perpendicular lines in a diagram?

Back

Perpendicular lines can be identified by the right angle symbol (a small square) where they intersect.