Parallel Line Theorems and Converse

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

State the angle relationship and find the measure of angle 1

• Corresponding
  110

• Alternate Exterior
  110

• Corresponding
  70

• Alternate Exterior
  70

For alternate exterior angles to be congruent, the two lines must be _____________

• congruent

• parallel

• perpendicular

• bisectors

In the drawing, line l || m. What is true of angles 1 and 2 and why?

• They are supplementary by same side interior angles theorem.

• They are congruent by alternate interior angles theorem

• They are congruent by alternate exterior angles theorem.

• They are congruent by corresponding angles theorem.

• Alt Int Angle Post
• Alt Int Angle Definition
• Alt Int Angle Thm
• Alt Int Angle Converse

If you know that angle 4 ≅ angle 6, 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

If ∠5 ≅ ∠13, what lines are parallel by which converse theorem?

• A & B by corresponding angles converse

• A & B by consecutive interior angles converse

• C & D by corresponding angles converse

• C & D by consecutive interior angles converse

Corr Angles

• Def of Corr Angles

• Corr Angle Postulate

• Corr Angle Convese

• S-S Int Thm

• Converse of Corresponding Angles Postulate

• Vertical Angles Theorem

• Reflexive Property of Congruence

• Transitive Property of Equality

1) Which statement restates the Given from the question?

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