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 type of angle measures exactly 180 degrees?

Back

A straight angle measures exactly 180 degrees.

Front

What is the relationship between complementary angles?

Back

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

Front

What is the relationship between 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 measures 30 degrees, what is the measure of its complementary angle?

Back

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

Front

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

Back

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

Front

If angle C is a right angle, what is its measure?

Back

Angle C measures 90 degrees.

Front

If angle D measures 45 degrees, what is the measure of its vertical angle?

Back

The vertical angle also measures 45 degrees.

Front

If angle E measures 75 degrees, what is the measure of its complementary angle?

Back

The complementary angle measures 15 degrees (90 - 75 = 15).