Parallel or Not Parallel Using Converses

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Alternate exterior angles theorem

• Alternate exterior  angles converse

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Alternate exterior angles theorem

• Alternate exterior  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

• Not valid

• Corresponding angles postulate

• Corresponding angles converse

• Consecutive interior angles theorem

• Consecutive interior angles converse

• Not valid

• Corresponding angles postulate

• Corresponding 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 interior angles theorem

• Alternate interior angles converse

• Alternate exterior angles theorem

• Alternate exterior  angles converse

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Alternate exterior angles theorem

• Alternate exterior  angles converse

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Consecutive interior angles theorem

• Consecutive interior angles converse