Measuring and Classifying Angles

What is this tool called and what is it used for?

• A ruler used to measure lines.
• A protractor used to measure lines.
• A ruler used to measure angles.
• A protractor used to measure angles.

What is an obtuse angle?

• An angle that measures more than 90 degrees, but less than degrees 180 degrees.
• An angle that measures less than 90 degrees.
• An angle that measures 90 degrees.
• An angle that measures 180 degrees. 

What is a right angle?

• An a angle that measures more than 90 degrees.
• An angle that measures less than 90 degrees.
• An angle that measures exactly 90 degrees.
• An angle that measures 180 degrees. 

What is a straight angle?

• An angle that measures more than 90 degrees.
• An angle that measures less than 90 degrees.
• An angle that measures exactly 90 degrees.
• An angle that measures exactly 180 degrees. 

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

• 21 degrees.
• 34 degrees.
• 70 degrees.
• 172 degrees. 

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

• 56 degrees.
• 180 degrees.
• 142 degrees.
• 97 degrees. 

Which angle type is pictured?

• Acute
• Right
• Obtuse
• Straight

Which angle type is pictured?

• Acute
• Right
• Obtuse
• Straight

Which type of angle is pictured?

• Acute
• Right
• Obtuse
• Straight

If the measure of ∠2 is 83°, what is the measure of ∠3?

• 7°
• 17°
• 83°
• 97°