Types of Angles (Acute, Obtuse, Right, Straight...

What is an angle that measures less than 90 degrees called?

• Obtuse angle

• Acute angle

• Right angle

• Straight angle

A right angle measures exactly (a)   degrees.

What type of angle measures greater than 90 degrees but less than 180 degrees?

• Reflex angle

• Acute angle

• Obtuse angle

• Right angle

In your own words, explain how you can tell the difference between an acute angle and an obtuse angle.

Fill in the blank: A (a)   angle measures exactly 180 degrees and looks like a flat line.

Which of these describes a reflex angle?

• Greater than 180 degrees but less than 360 degrees

• Exactly 180 degrees

• Less than 90 degrees

• Exactly 90 degrees