Parallel Lines Theorems

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Consecutive interior angles theorem

• Consecutive interior angles converse

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Consecutive interior angles theorem

• Consecutive interior angles converse

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Consecutive interior angles theorem

• Consecutive interior angles converse

Using the given, determine if the conclusion is valid. If so, justify it.
Given:

• Not valid

• Alternate exterior angles theorem

• Alternate exterior angles converse

• Corresponding angles postulate

• Corresponding  angles converse

Using the given, determine if the conclusion is valid. If so, justify it.
Given:

• Not valid

• Alternate exterior angles theorem

• Alternate exterior angles converse

• Corresponding angles postulate

• Corresponding  angles converse

Using the given, determine if the conclusion is valid. If so, justify it.
Given:

• Not valid

• Alternate exterior angles theorem

• Alternate exterior angles converse

• Corresponding angles postulate

• Corresponding  angles converse

l || m

• True

• False

Which theorem according to the drawing indicates lines CD and EF are parallel?

• Converse of Corresponding angles theorem

• Converse of Same side interior angles theorem

• Converse of Alternate exterior angles theorem

• Converse of Alternate interior angles theorem

If angle 3 measures 47 degrees what is the measure of angle 6 is lines a and b are parallel?

• 47

• 133

• 43

• 90

State the angle relationship and find the measure of angle 1

• Corresponding
  110

• Alternate Exterior
  110

• Corresponding
  70

• Alternate Exterior
  70