Acute Right Obtuse Angles

This is what kind of angle?

• obtuse

• right

• straight

• acute

Name this triangle.

• acute triangle

• right triangle

• straight triangle

• obtuse triangle

Q1. What type of angle is less than 90 degrees?

• A) acute

• B) obtuse

• C) right

An angle that measures less than 90°

• Acute

• Obtuse

• Right

• Straight

What type of angle measures exactly 90 degrees?

• Acute angle

• Obtuse angle

• Right angle

• Straight angle

What type of angle is this?

• right angle

• acute angle

• obtuse angle

Which angle is smaller than a right angle?

• Acute angle

• Obtuse angle

• Straight angle

• Reflex angle

In a triangle, if one angle measures 100 degrees, what type of angle is it?

• Acute angle

• Obtuse angle

• Right angle

• Straight angle

This angle is:

• Smaller than a right angle

• A right angle

• Bigger than a right angle

Determine the measure of the angle. Think: is it acute or obtuse?

• 135^o

• 130^o

• 50^o

• 45^o