Angle Relationships

Front

What are adjacent angles?

Back

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

Front

What are complementary angles?

Back

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

Front

What are supplementary angles?

Back

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

Front

What are vertical angles?

Back

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

Front

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

Back

The complementary angle is 60 degrees (90 - 30 = 60).

Front

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

Back

The supplementary angle is 60 degrees (180 - 120 = 60).

Front

If two angles are adjacent and one measures 45 degrees, what could be the measure of the other angle if they are complementary?

Back

The other angle could measure 45 degrees (90 - 45 = 45).

Front

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

Back

The vertical angle is also 70 degrees.

Front

If angle D is 50 degrees, what is the measure of its supplementary angle?

Back

The supplementary angle is 130 degrees (180 - 50 = 130).

Front

What is the relationship between two angles that are both 90 degrees?

Back

They are complementary angles.