Vertical Angles

What are vertical angles?

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

If two angles are vertical, they have ________ measurements

• The same

• Different

Vertical angles are always

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

Which angles are vertical angles?

• $\angle8\ \&\ \angle7$

• $\angle8\ \&\ \angle6$

• $\angle8\ \&\ \angle5$

∠1 and ∠3 can best be described as -

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

What angle is vertical to angle 2?

• ∠4

• ∠1

• ∠2

• ∠5

Which are pairs of vertical angles?

• ∠COB and ∠COA

• ∠AOD and ∠AOC

• ∠COB and ∠AOD

• ∠BOD and ∠AOD

Which angle is a vertical angle to with $\angle7$  ?

•  $\angle1$  

•  $\angle5$  

•  $\angle3$  

•  $\angle6$  

•  $\angle9$  

Name the vertical angle to
∠h.

• ∠f
• ∠i
• ∠g
• ∠j

If m∠1 = 30°, then m∠3 = 

• 30°
• 60°
• 150°
• undetermined