Fast & Curious: Angles and Degrees (With Vertical Angles)

Front

What is the size of a straight angle in degrees?

Back

180°

Front

What is the size of a right angle in degrees?

Back

90°

Front

What are complementary angles?

Back

Two angles whose measures add up to 90 degrees.

Front

If ∠A and ∠B are complementary angles and ∠A is 30 degrees, how big is ∠B?

Back

60°

Front

If ∠A is the same size as ∠B and they form a right angle, how big is ∠A?

Back

45°

Front

What is the term for two angles whose measures add up to 180 degrees?

Back

Supplementary angles.

Front

What is the measure of an acute angle?

Back

An angle that is less than 90 degrees.

Front

What is the measure of an obtuse angle?

Back

An angle that is greater than 90 degrees but less than 180 degrees.

Front

What is a vertical angle?

Back

Angles that are opposite each other when two lines intersect, and they are equal in measure.

Front

How do you find the measure of an angle if you know its supplement?

Back

Subtract the measure of the supplement from 180 degrees.