Geometry Review

Front

What is a polygon?

Back

A polygon is a closed figure made up of straight line segments. It has at least three sides and angles.

Front

What is the sum of the interior angles of a polygon with five sides?

Back

The sum of the interior angles of a polygon with n sides is (n-2) × 180 degrees. For a five-sided polygon, it is (5-2) × 180 = 540 degrees.

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 right angle?

Back

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

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

How do you measure an angle?

Back

An angle is measured in degrees using a protractor.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What type of angle is formed by the hands of a clock at 3:40 pm?

Back

The angle formed is an obtuse angle.

Front

If a door is open at 55 degrees, what type of angle is this?

Back

This is an acute angle because it is less than 90 degrees.