1.8 Angle Definitions and Relationships

Which angles are vertical angles?

• $\angle8\ \ and\ \angle7$

• $\angle8\ and\ \angle6$

• $\angle8\ and\ \angle5$

Which angle is a linear pair with $\angle1$  ?

•  $\angle2$  

•  $\angle3$  

•  $\angle4$  

•  $\angle5$  

•  $\angle6$  

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

•  $\angle1$  

•  $\angle5$  

•  $\angle3$  

•  $\angle6$  

•  $\angle9$  

Find the missing angle.  Find x.

• 20^o
• 70^o
• 160^o
• 180^o

The angle relationship shown is -

• complementary angles
• supplementary angles
• vertical angles
• angle bisector

The angle relationship shown is - 

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

Find the value of x.

• 18°
• 28°
• 38°
• 118°

What equation could be used to solve for the missing angle measure?

• x + 19 = 180

• x + 19 = 19

• x + 19 = 60

• x + 19 = 90

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

What are complementary 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.