Angles on Parallel Lines

• a = 110^o, b = 70^o

• a = 70^o, b = 110^o

• a = 110^o, b = 50^o

• Corresponding Angles

• Co-interior Angles

• Alternate Angles

• Corresponding Angles

• Co-interior Angles

• Alternate Angles

• a = 20^o

• a = 110^o

• a = 70^o

If you know that angle 1 ≅ angle 7, how can you prove PQ||RS?

• Converse of corresponding angle theorem

• Converse of alternate interior angles theorem

• Converse of same side interior angles postulate

• Converse of alternate exterior angles theorem

In the diagram, which of the following statements are false?

• ∠1 and ∠4 are vertical angles

• ∠4 and ∠5 are alternate interior angles

• ∠6 and ∠8 are alternate interior angles

• ∠2 and ∠6 are corresponding angles

If you know that PQ||RS, how can you prove angle 4 ≅ angle 8

• Converse of corresponding angle theorem

• Corresponding angle theorem

• Vertical angle theorem

• Interior angle theorem

If you know that angle 1 ≅ angle 5, how can you prove PQ||RS?

• Converse of corresponding angle theorem

• Corresponding angle theorem

• Vertical angle theorem

• Interior angle theorem

Identify the correct statement.

• ∠1 & ∠8
  are alternate interior angles

• ∠2 & ∠3
  are alternate interior angles

• ∠4 & ∠5
  are alternate interior angles

• ∠7 & ∠4
  are alternate interior angles

Which of the following is NOT an alternate interior pair?

• ∠C and ∠D

• ∠Q and ∠C

• ∠C and ∠Q

• ∠P and ∠D