Parallel Lines Transversals Proof

Which two angles are supplementary

• ∠1 and ∠3

• ∠2 and ∠6

• ∠4 and ∠6

• ∠7 and ∠8

Which two angles are alternate exterior?

• 1 & 3

• 2 & 6

• 4 & 7

• 7 & 1

Which two angles are corresponding?

• 4 and 8

• 4 and 6

• 1 and 2

• 2 and 8

If angle 2 is 70 degrees, what is the measure of angle 4?

• 70

• 110

• 20

• 180

Find x.

• 130

• 50

Match the following statement with its reason to complete the proof

• <1 congruent to <2

• Vertical Angles Theorem

• <2 congruent to <3

• Given 

• m is parallel to n

• Converse of Corresponding Angles Postulate

• <1 congruent to <3

• Transitive Property

Solve for x

• 6

• 140

• 20

• 90

• 3x + 10 + 3x - 28 = 360

• -18x = 180

• 6x + 18 = 180

• 6x - 18 = 180

Angles that lie on opposites sides of the transversal and outside of the parallel lines.

• Alt. Int. Angles

• Vertical Angles

• Alt. Ext. Angles

• Same-Side Int. Angles

a line that intersects two or more lines (usually parallel lines)

Hint: Line "l" in the picture

• Parallel Line

• Vertex

• Vertical Angles

• Transversal