Lesson 11 Proving Parallel Lines

Same Side Interior Angle Theorem

Alternate Exterior Angle Theorem

Same Side Exterior Angle Theorem

Corresponding Angle Postulate

Linear Pair Theorem

Alternate Interior Angle Theorem

Vertical Angle Theorem

Verticla angle Theorem

Alternate Interior Angle Theorem

Corresponding Angle Postulate

Alternate Exterior Angle Theorem

Same Side Interior Angle Theorem

Same Side Exterior Angle Theorem

Linear Pair Theorem

Linear Pair Theorem

Corresponding Angle Postulate

Same Side Exterior Angle Theorem

Vertical Angle theorem

Alternate Interior Angle Theorem

Same Side Interior Angle Theorem

Alternate Exterior Angle Theorem

Alternate Interior Angle Theorem

Same Side Exterior Angle Theorem

Linear pair Theorem

Vertical Angle Theorem

Corresponding Angle Postulate

Alternate Exterior Angle Theorem

Same Side Interior Angle Theorem

Alternate Interior Angle Theorem

Corresponding Angle Postulate

Vertical Angle Theorem

Alternate Exterior Angle Theorem

Linear pair Theorem

Same Side Exterior Angle Theorem

Same Side Interior Angle Theorem

a ll b (line a is parallel to line b)

c ll d (line c is parallel to line d)

Not enough information to say any lines are parallel

Linear pair Theorem

Vertical Angle Theorem

Same Side Exterior Angle Theorem

Not an angle pair

Same Side Interior Angle Theorem

Corresponding Angle Postulate

Alternate Exterior Angle Theorem

Alternate Interior Angle Theorem

a ll b (line a is parallel to line b)

c ll d (line c is parallel to line d)

Not enough information to say any lines are parallel

Corresponding Angle Postulate

Same Side Exterior Angle Theorem

Alternate Interior Angle Theorem

Alternate Exterior Angle Theorem

Same Side Interior Angle Theorem

Linear pair Theorem

Vertical Angle Theorem

Not an angle pair

a ll b (line a is parallel to line b)

c ll d (line c is parallel to line d)

Not enough information to say any lines are parallel

Alternate Interior Angle Theorem

Vertical Angle Theorem

Same Side Interior Angle Theorem

Corresponding Angle Postulate

Linear pair Theorem

Same Side Exterior Angle Theorem

Alternate Exterior Angle Theorem

Not an angle pair

a ll b (line a is parallel to line b)

c ll d (line c is parallel to line d)

Not enough information to say any lines are parallel

Alternate Interior Angle Theorem

Alternate Exterior Angle Theorem

Corresponding Angle Postulate

Same Side Interior Angle Theorem

Not an angle pair

Same Side Exterior Angle Theorem

Vertical Angle Theorem

Linear pair Theorem

a ll b (line a is parallel to line b)

c ll d (line c is parallel to line d)

Not enough information to say any lines are parallel

Alternate Interior Angle Theorem

Vertical Angle Theorem

Same Side Interior Angle Theorem

Linear pair Theorem

Alternate Exterior Angle Theorem

Corresponding Angle Postulate

Same Side Exterior Angle Theorem

Not an angle pair

c and d

b and d

a and b

a and c

Corresponding Angle Postulate

Same Side Exterior Angle Theorem

Vertical Angle Theorem

Alternate Exterior Angle Theorem

Same Side Interior Angle Theorem

Linear pair Theorem

Alternate Interior Angle Theorem

b and d

c and d

a and c

a and b

Linear pair Theorem

Vertical Angle Theorem

Same Side Interior Angle Theorem

Alternate Exterior Angle Theorem

Alternate Interior Angle Theorem

Same Side Exterior Angle Theorem

Corresponding Angle Postulate

2x + 2 = x + 56

2x + 2 + x + 56 = 180

yes

no

yes

no

not sure

yes

no

not sure

yes

no

not enough information

64

90

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