Angle pairs

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

Define complementary angles.

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

Define supplementary angles.

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

If angle A and angle B are supplementary, what is the relationship between their measures?

Back

The sum of the measures of angle A and angle B is 180 degrees.

Front

If angle C and angle D are complementary, what is the relationship between their measures?

Back

The sum of the measures of angle C and angle D is 90 degrees.

Front

What is the measure of each angle in a pair of complementary angles if one angle measures 30 degrees?

Back

The other angle measures 60 degrees.

Front

What is the measure of each angle in a pair of supplementary angles if one angle measures 110 degrees?

Back

The other angle measures 70 degrees.

Front

If two angles are vertical, what can be said about their measures?

Back

The measures of vertical angles are equal.

Front

What is the relationship between adjacent angles formed by two intersecting lines?

Back

Adjacent angles formed by two intersecting lines are supplementary.