Lines and Angles Review

Front

What are parallel lines?

Back

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

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is an acute angle?

Back

An angle that measures less than 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 intersecting lines?

Back

Lines that cross each other at any angle.

Front

What is the symbol for parallel lines?

Back

The symbol || is used to denote parallel lines.

Front

What is the symbol for perpendicular lines?

Back

The symbol ⊥ is used to denote perpendicular lines.

Front

How do you identify a right angle in a diagram?

Back

Look for a small square in the corner of the angle.