Prove Angle Relations

Vertical angles are always

• acute

• total 180 degrees

• congruent (equal measures)

• adjacent angles

What is the vertical angle to angle 4?

• Angle 2

• Angle 6

• Angle 8

• Angle 7

Given the following two parallel lines cut by a transversal. Which pair of angles represents alternate interior angles?

• True

• False

Line l and m are cut by transversal n.  Which statement proves that line l is parallel to line m?

• ∠2 ≅ ∠3

• ∠2 ≅ ∠6 

• m∠7 + m∠8 = 180°

• m∠3 + m∠5 = 90°

• Transitive Property of Equality

• Substitution

• Reflexive Property of Equality

• Transitive Property of Congruence

If ∠6 is supplementary to ∠7, which of the following can be used to prove lines are parallel?

• Corresponding Angles Converse

• Alternate Interior Angles Converse

• Alternate Exterior Angles Converse

• Interiors on Same Side Converse

• None of the above can be used

Which statement represents what you have to prove from the question?

• 
• 
• 

What is reason 10?

• Alternate interior angles converse

• Alternate interior angles theorem

• Definition of congruence

• Corresponding angles converse

What is the reason for step 3?

• Alternate Exterior

• Alternate Interior

• Linear Pairs add to 180

• Vertical