Angle Relationships

Front

What are angle relationships?

Back

Angle relationships refer to the ways in which angles interact with each other, including complementary, supplementary, vertical, and adjacent angles.

Front

What are complementary angles?

Back

Complementary angles are two angles that add up to 90°.

Front

What are supplementary angles?

Back

Supplementary angles are two angles that add up to 180°.

Front

What are vertical angles?

Back

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

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 m∠1 = 30°, what is m∠3 if they are complementary?

Back

m∠3 = 60° (because 30° + 60° = 90°).

Front

If m∠1 = 30°, what is m∠3 if they are supplementary?

Back

m∠3 = 150° (because 30° + 150° = 180°).

Front

Find the value of x if the angles are complementary and x + 25° = 90°.

Back

x = 65°.

Front

Find the value of x if the angles are supplementary and x + 25° = 180°.

Back

x = 155°.

Front

What is the relationship between angles that add up to 180°?

Back

They are called supplementary angles.