Types of Angles and Lines

Front

Right angle

Back

An angle that forms a square corner and has a measure of 90 degrees.

Front

Acute angle

Back

An angle that is open less than a right angle and has a measure less than 90 degrees.

Front

Obtuse angle

Back

An angle that is open more than a right angle but less than a straight angle. This angle measures between 90 and 180 degrees.

Front

Parallel lines

Back

Lines that never intersect.

Front

Perpendicular lines

Back

Lines that intersect to form right angles.

Front

What is this a picture of? (Options: Acute angle, Obtuse angle, Parallel lines, Perpendicular lines)

Back

Perpendicular lines

Front

What is this a picture of?

Back

Obtuse angle

Front

What is this a picture of?

Back

Acute angle

Front

What is this a picture of?
Options: Perpendicular lines, Parallel lines, Acute angle, Obtuse angle

Back

Parallel lines

Front

What is this a picture of? (Options: Acute angle, Obtuse angle, Right angle, Parallel lines)

Back

Right angle