Do-now 8/26 - Angle relationships

If m∠1 = 30°, then m∠3 = 

• 30°
• 60°
• 150°
• undetermined

Find the missing angle.  Find x.

• 20^o
• 70^o
• 160^o
• 180^o

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°

Vertical angles are always

• 90 degrees

• 180 degrees

• congruent

• adjacent

Name the angle relationship shown.

• Adjacent

• Vertical

• Complementary

• Supplementary

• No relationship

∠1 and ∠2 are _____________

• Complementary

• Supplementary

• Adjacent

• Vertical

• Not related

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.

Are these angles an example of complementary, supplementary, or neither?

• Complementary
• Supplementary
• Neither

These angles are...

• Complementary
• Supplementary
• Neither

Find the missing angle.

• 60
• 70
• 50
• 140