Name, measure, and classify Angles

Name, Measure, and Classify Angles

The degrees matter!

Acute angles are less than 90 degrees

Multiple Choice

Which of the following angles is NOT acute?

• 79°

• 89º

• 91º

• 1º

Right Angles are exactly 90 degrees

Multiple Choice

How many right angles are there altogether in the diagram?

• 2

• 4

• 8

• 16

Obtuse

Angles that are more than 90 degrees, but less than 180 degrees

Multiple Choice

• < AOB

• < BOC

• < BOD

• < COD

Straight Angle

Straight angles are exactly 180º

A straight line.

Multiple Choice

• 90

• 100

• 180

• 360

Measuring Angles on a straight line...

all parts have to equal 180º

Multiple Choice

• 47

• 48

• 84

• 96

Multiple Choice

A point where two or more lines meet, a corner. HINT: You use this to name an angle!

• Parallel lines
• a vertex
• vertical lines
• transversal

Multiple Choice

Which type of angle is pictured?

• Acute
• Right
• Obtuse
• Straight

Multiple Choice

Which angle type is pictured?

• Acute
• Right
• Obtuse
• Straight

Multiple Choice

Which angle type is pictured?

• Acute
• Right
• Obtuse
• Straight

Multiple Choice

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

• 56 degrees.

• 180 degrees.

• 142 degrees.

• 97 degrees.

Multiple Choice

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

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

Multiple Choice

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. 

Multiple Choice

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. 

Multiple Choice

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. 

Multiple Choice

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.

Multiple Choice

Which angle has a measure of 128 degrees?

Multiple Choice

Which angle has a measure of 128 degrees?

Multiple Choice

Classify the angle

• acute

• obtuse

• right

• straight

Multiple Choice

Classify the angle

• acute

• obtuse

• right

• straight

Multiple Choice

Classify the angle

• right

• acute

• obtuse

• straight

Multiple Choice

Classify the angle

• right

• obtuse

• acute

• straight

Multiple Choice

What type of angle is shown?

• acute

• obtuse

• right

• straight

Multiple Choice

What type of angle is shown?

• acute
• obtuse
• right
• straight

Multiple Choice

What type of angle is shown?

• acute
• obtuse
• right 
• straight