Angle Relationships

​Angle Relationships

By Mrs. Watson

Vertical Angles

Two angles that are across from each other when two lines intersect.

These angles are congruent.

Multiple Choice

Which are pairs of vertical angles?

• ∠COB & ∠COA
• ∠AOD & ∠AOC
• ∠COB & ∠AOD
• ∠BOD & ∠AOD

Multiple Choice

Vertical angles are always

• acute
• total 180 degrees
• congruent (equal measures)
• adjacent angles

Adjacent Angles

Adjacent angles are two angles that share a vertex and a side.

They are next to each other.

Multiple Choice

Which are pairs of adjacent angles?

• ∠COB & ∠DOA
• ∠AOD & ∠AOC
• ∠COB & ∠AOD
• ∠BOD & ∠AOC

Multiple Choice

Which names a pair of adjacent angles?

• ∠CXD and ∠FXE
• ∠CXF and ∠DXE
• ∠CXD and ∠DXE

Complementary Angles

Supplementary Angles

Multiple Choice

Complementary Angles are...

• Two angles that are next to each other.

• Two angles whose measures add up to $$90\degree$$  

• Two angles whose measures add up to $$180\degree$$  

• Two angles that are across from each other and whose measures are equal.

Multiple Choice

Supplementary Angles are...

• Two angles that are next to each other.

• Two angles whose measures add up to $$90\degree$$  

• Two angles whose measures add up to $$180\degree$$  

• Two angles that are across from each other and whose measures are equal.

Multiple Choice

True or False. These angles are complementary.

• True

• False

Multiple Choice

• Complementary

• Supplementary