Parallel Lines and Transversal Proofs

Which lines are proven parallel if Angles 12&7 are used?

• l & m

• s & t

Which lines are proven parallel if Angles 2 and 4 are used?

• s & t

• l & m

Which lines are proven parallel if Angles 6 and 10 are used?

• none

• l & m

• s & t

Which lines are proven parallel if Angles 1 and 14 are used?

• none

• s & t

• l & m

Which parallel lines are proven parallel if Angles 3 and 16 are used?

• none

• s & t

• l & m

Which lines are proven parallel if Angles 1 and 15 are used?

• none

• s & t

• l & m

Angles 3 and 8 prove parallel lines, true or false?

• true

• false

Def of Alt Ext Angles

Alt Ext Angle Thm

Alt Ext Angle Convese

Alt Int Angle Thm

• Def of Alt Ext Angles

• Alt Ext Angle Thm

• Alt Ext Angle Convese

• Alt Int Angle Thm

What is the correct reason for statement #1?

• Given

• Given by diagram

• If two parallel lines are cut by a transversal, then corresponding angles are congruent.

• If two parallel lines are cut by a transversal, then consecutive interior angles are supplementary.

Which is the correct reason for statements 2 and 4 in the proof?

• Corresponding Angles

• Substitution

• Definition of Congruent Angles

• Vertical Angles are congruent.