Angle Relationships

Find the value of x.

• 15
• 16
• 18
• 19

What kind of angles are shown?

• complementary
• supplementary
• adjacent
• corresponding

∠1 and ∠3 can best be described as - 

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

What is an example of a pair of complementary angles?

• 13° and 45°
• 10° and 170°
• 81° and 9°
• 90° and 3°

Tell whether the angles are complementary or supplementary. Then find the value of x.

• Complementary; x=25
• Complementary; x=5
• Supplementary; x=25
• Supplementary; x=5

Find the missing angle.

• 60°
• 70°
• 50°
• 140

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.

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 vertical angles?

• Angles that add up to 180°
• Angles that add up to 90°
• Angles that add up to 360°
• Angles that are opposite of each other when lines intersect and are equal

Find the missing angle.  Find x.

• 20^o
• 70^o
• 160^o
• 180^o