Complementary, Supplementary, Vertical, 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

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

Front

If angle A is 30 degrees, what is the measure of its complementary angle?

Back

60 degrees (90 - 30 = 60).

Front

If angle B is 120 degrees, what is the measure of its supplementary angle?

Back

60 degrees (180 - 120 = 60).

Front

Are two angles that measure 45 degrees each complementary or supplementary?

Back

Complementary (45 + 45 = 90).

Front

Are two angles that measure 100 degrees and 80 degrees complementary or supplementary?

Back

Supplementary (100 + 80 = 180).

Front

If two angles are vertical, what can we say about their measures?

Back

They are equal.

Front

If angle C is 70 degrees, what is the measure of its supplementary angle?

Back

110 degrees (180 - 70 = 110).