Measuring and Classifying Angles

An angle that is exactly 90 degrees.

• right

• acute

• obtuse

• straight

An angle that is less than 90^o.

• right

• acute

• obtuse

• straight

An angle that is more than 90^o.

• right

• acute

• obtuse

• straight

Classify this angle.

• Acute angle

• Right angle

• Complementary angles

• Obtuse angle

What type of angle is shown?

• Acute

• Obtuse

• Right

• Straight

Classify the angle.

• acute

• obtuse

• right

• straight

A popular unit for angle measure

• degrees

• inches

• centimeters

• liters

What is the measure of the following angle?  

• 21 degrees.

• 34 degrees.

• 70 degrees.

• 172 degrees. 

_{What is the measure of the following angle?}  

• 123 degrees.

• 180 degrees.

• 142 degrees.

• 97 degrees. 

An angle that is exactly 180^o.

• right

• acute

• obtuse

• straight