Lines and Angles Review

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 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 straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What are parallel lines?

Back

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

Front

What is a line?

Back

A line is a straight path that continues in both directions without ending.

Front

What is a line segment?

Back

A line segment is part of a line that has two endpoints.

Front

What is a ray?

Back

A ray is part of a line that has one endpoint and extends infinitely in one direction.

Front

How do you identify an acute angle in a diagram?

Back

An acute angle is identified by its measure being less than 90 degrees, often appearing sharp or narrow.

Front

How do you identify a right angle in a diagram?

Back

A right angle is often marked with a small square in the corner of the angle.