Measuring and Classifying Angles

Classify the angle that measures 30 degrees as acute, obtuse, or right.

• obtuse

• straight

• acute

• right

Identify the type of angle formed when the measure of an angle is 60 degrees.

• Obtuse angle

• Acute angle

• Right angle

• Straight angle

What is the name of an angle that measures exactly 90 degrees?

• Right angle

• Straight angle

• Acute angle

• Obtuse angle

Classify the angle that measures 100 degrees as acute, obtuse, or right.

• obtuse

• acute

• right

• obtuse

Name the angle that is less than 90 degrees.

• Right angle

• Acute angle

• Obtuse angle

• Straight angle

If an angle measures 120 degrees, what type of angle is it?

• Straight angle

• Right angle

• Obtuse angle

• Acute angle

• m∠GHK=80.5, 
  m∠KHJ=161
• m∠GHK=161, 
  m∠KHJ=80.5
• m∠GHK=80.5, 
  m∠KHJ=80.5
• m∠GHK=161, 
  m∠KHJ=161

Solve for x

• x = 77

• x = 7.5

• x = 8

• x = 18

• Acute

• Right

• Obtuse

• Reflex

What is the measure of a right angle?