Angle Relationships

∠1 and ∠3 can best be described as -

• complementary angles
• supplementary angles
• vertical angles
• adjacent angles

What are supplementary angles?

• Angles that add up to 180°
• Angles that add up to 90°
• Angles that are equal to each other
• Angles that are opposite of each other when lines intersect

If ∠BPD and ∠DPC have a sum of 72°. What is ∠APC?

• 18°
• 90°
• 108°
• 180°

Solve for x

• 6
• 140
• 20
• 90

Identify the relationship:

• vertical

• supplementary (angles add up to 180^o)

• complementary (angles add up to 90^o)

Vertical angles are always _________.

• Supplementary

• Congruent

If angle ∠ABD is 67°. What is ∠DBC?

• 180°
• 90°
• 67°
• 23°

Which are pairs of vertical angles?

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

If ∠COB is 124°, then what is ∠BOD? How are they related?

• 56°, they are supplementary
• 90°, they are complementary
• 124°, they are vertical

Find the value of x

• -5
• 28
• 19
• -3