Angle Relationships and Equations

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are vertical angles?

Back

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

Front

What are adjacent angles?

Back

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

Front

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

Back

110 degrees.

Front

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

Back

60 degrees.

Front

Find the value of x if angle C and angle D are supplementary and angle C is 45 degrees.

Back

x = 135 degrees.

Front

Find the value of x if angle E and angle F are complementary and angle E is 25 degrees.

Back

x = 65 degrees.

Front

If two angles are vertical and one measures 50 degrees, what is the measure of the other angle?

Back

50 degrees.

Front

If angle G is 90 degrees, what is the measure of angle H if they are complementary?

Back

Angle H is 0 degrees.