Opposite Angles

How can we describe these angles?

• Corresponding angles

• Alternate angles

• Interior angles

• Vertically opposite angles

Find the angle at x

• 105

• 75

• 180

• 85

Find the angle at y

• 105

• 85

• 75

• 80

What is the value of x?

• 53

• 67

• 57

• 133

What is the value of angle b?

• 140

• 40

• 50

• 30

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

∠1 and ∠3 can best be described as -

• complementary angles
• supplementary angles
• vertically opposite angles
• adjacent angles