Opposite Angles

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

Q1. What is the angle of a right triangle?

• A) 100°

• B) 80°

• C) 90°

• D) 180°

• Alternate Angles

• Vertically Opposite Angles

• Corresponding Angles

• Adjacent Angles

Find the angle at x

• 105

• 75

• 180

• 85

Find the angle at y

• 105

• 85

• 75

• 80

What is the value of y?

• 115

• 25

• 65

• 35

What is the value of x?

• 140

• 40

• 50

• 90

Which of the following is correct?

• a = 72° (vertically opposite angles)

  b = 72° (corresponding angles)

• a = 72° (vertically opposite angles)

  b = 108° (co-interior angles)

• a = 72° (vertically opposite angles)

  b = 72° (co-interior angles)

• a = 72° (vertically opposite angles)

  b = 108° (corresponding angles)

What name do we give to these angles?

• Vertically opposite

• Allied

• Corresponding

• Alternate