Complementary, Supplementary, Vertical and Adjacent Angles

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always equal.

Front

What are adjacent angles?

Back

Two angles that share a common side and a common vertex but do not overlap.

Front

If ∠A and ∠B are complementary and ∠A measures 30°, what is the measure of ∠B?

Back

60°

Front

If ∠C and ∠D are supplementary and ∠C measures 110°, what is the measure of ∠D?

Back

70°

Front

Identify the angle pair: ∠1 and ∠2 are formed by two intersecting lines. What type of angles are they?

Back

Vertical Angles.

Front

If two angles form a linear pair, what is true about their measures?

Back

They are supplementary; their measures add up to 180 degrees.

Front

Find the value of x if ∠A = 2x and ∠B = 3x are supplementary angles.

Back

x = 36°.

Front

What is the relationship between adjacent angles and linear pairs?

Back

Adjacent angles that are also a linear pair are supplementary.