Degrees for Angles Acute Obtuse Straight Reflex

An angle that measures between 180° and 360°

• Acute

• Obtuse

• Straight

• Reflex

• Right

An instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge

• Protractor

• Ruler

• Compass

Identify the type of angle shown....

• Acute

• Obtuse

• Reflex

• Right Angle

Define Straight Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Main Street and Walnut Street make a _______ angle.

• Acute

• Obtuse

• Right

• Straight

What is the measure of the following angle?  

• 10 degrees.

• 40 degrees.

• 67 degrees.

• 168 degrees. 

What is the measurement of a right angle?

• 70

• 80

• 90

• 180

What is the definition of an acute angle?

• Lines that intersect to form right angles.

• An angle that is open more than a right angle but less than a straight angle. This angle measures between 90 and 180 degrees.

• An angle that forms a square corner and has a measure of 90 degrees.

• An angle that is open less than a right angle and has a measure less than 90 degrees.

What is the definition of an obtuse angle?

• An angle that is open more than a right angle but less than a straight angle. This angle measures between 90 and 180 degrees.

• An angle that forms a square corner and has a measure of 90 degrees.

• An angle that is open less than a right angle and has a measure less than 90 degrees.

• Lines that intersect to form right angles.

What could be the measurement of an obtuse angle?

• 90

• 20

• 130

• 89