Types of Angles

What is an acute angle?

• An angle that measures less than 90 degrees.

• An angle that measures exactly 90 degrees.

• An angle that measures more than 180 degrees.

• An angle that measures between 90 and 180 degrees.

What is a right angle?

• An angle that measures exactly 90 degrees.

• An angle that measures exactly 45 degrees.

• An angle that measures exactly 180 degrees.

• An angle that measures less than 90 degrees.

What is a reflex angle?

• An angle that measures less than 90 degrees.

• An angle that measures exactly 180 degrees.

• An angle that measures greater than 180 degrees but less than 360 degrees.

• An angle that measures between 90 and 180 degrees.

What is the measure of an angle that is complementary to a 30-degree angle?

• 45 degrees

• 60 degrees

• 75 degrees

• 90 degrees

What is an obtuse angle?

• An angle that measures less than 90 degrees.

• An angle that measures exactly 90 degrees.

• An angle that measures greater than 90 degrees but less than 180 degrees.

• An angle that measures greater than 180 degrees.

What is a straight angle?

• An angle that measures exactly 90 degrees.

• An angle that measures exactly 180 degrees.

• An angle that measures less than 90 degrees.

• An angle that measures more than 180 degrees.

How do you find the measure of a missing angle in a triangle?

• The sum of the angles in a triangle is always 180 degrees.

• The sum of the angles in a triangle is always 90 degrees.

• Each angle in a triangle must be equal to 60 degrees.

• The angles in a triangle can be any value as long as they are positive.

If one angle measures 90 degrees and another measures 45 degrees, what is the measure of the third angle?

• 30 degrees

• 45 degrees

• 60 degrees

• 75 degrees

What is the relationship between supplementary angles?

• Two angles are supplementary if their measures add up to 180 degrees.

• Two angles are supplementary if they are adjacent to each other.

• Two angles are supplementary if they are both acute angles.

• Two angles are supplementary if their measures add up to 90 degrees.

What type of angle is formed by two rays that point in exactly opposite directions?

• A right angle.

• An acute angle.

• A straight angle.

• An obtuse angle.