Review for Finals 3: Measure & Class. Angles; ID Polygons

Front

Find the missing angle. Find x.

Back

20°

Front

What is the correct way to label the angle shown?

Back

∠DEF

Front

Which shape is a dodecagon?

Back

A dodecagon is a polygon with 12 sides.

Front

∠BCE is what type of angle?

Back

Right

Front

This polygon is an example of a __________.

Back

pentagon

Front

What is the sum of the interior angles of a triangle?

Back

180°

Front

What is the definition of a polygon?

Back

A polygon is a closed figure with three or more straight sides.

Front

How many sides does a hexagon have?

Back

6 sides

Front

What is an acute angle?

Back

An angle that is less than 90°.

Front

What is an obtuse angle?

Back

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