Angles on Parallel Lines

How can we describe these angles?

• Corresponding angles

• Alternate angles

• Interior angles

• Vertically opposite angles

How can we describe these angles?

• Corresponding angles

• Alternate angles

• Interior angles

• Vertically opposite angles

How big is angle x?

• 312

• 48

• 132

• 228

Given this diagram, what knowledge of angles should you use to solve for x?

• Corresponding angles are the same size

• Vertically opposite angles are the same size

• Interior angles add to 180

• Angles on a straight line add to 180

• Alternate angles are the same

Identify possible mistakes with this question.

• Angle A and Angle B do not make 180

• The algebra is the wrong way around

• The diagram might be incorrect

• Both angles have x in

Corresponding angles in the same position on parallel lines are

• equal

• supplementary

• vertically opposite

• complementary

In the diagram of parallel lines cut by a transversal, shown above, which of the following statements is false?

• ∠3 and ∠4 are vertically opposite angles.

• ∠5 and ∠8 are corresponding angles.

• All of the statements are false

• ∠3 and ∠6 are alternate angles.

Which of the following statements is ALWAYS TRUE when parallel lines are cut by a transversal?

• The sum of the degree measure of corresponding angles is 180°.

• Corresponding angles are supplementary.

• Vertically opposite angles are acute

• The sum of co interior angles is 180°

In the figure, the angles are formed by a transversal and two parallel lines. Explain why <5 and <2 are equal.

• They are alternate angles

• They are corresponding angles

• They are vertically opposite angles

• They are supplementary angles

In the diagram, what is the measure of angle 5 ?