Benfield's Geometry Review

Front

Two lines that are the same distance apart and never touch.

Back

Parallel lines

Front

Two lines that intersect and make a right angle.

Back

Perpendicular lines

Front

An angle that is less than 90 degrees.

Back

Acute angle

Front

An angle that is 180 degrees.

Back

Straight angle

Front

An angle that is greater than 90 degrees but less than 180 degrees.

Back

Obtuse angle

Front

An angle that is exactly 90 degrees

Back

Right angle

Front

The point where two lines or rays meet

Back

vertex