Parallel Lines with a Transversal forming angles of

Parallel Lines with a Transversal …forming angles of fun!

The Big Picture Parallel Lines: j and k Transversal: l

Corresponding Angles • “Corresponding” means “matching” • corresponding angles at the same location at each intersection.

Name the Corresponding Angles

1 3 2 4 5 7 6 8

Interior Angles • “Interior” means “inside” (the parallel lines).

Alternate Interior Angles • To “alternate” means to switch back and forth (across the transversal) • Are Equal

1 3 2 4 5 7 6 8

Exterior Angles • “Exterior” means “outside” (the parallel lines). • Are Supplementary

Alternate Exterior Angles • To “alternate” means to switch back and forth (across the transversal) • Are Equal (Vertical)

1 3 2 4 5 7 6 8

Now that we know, LETS USE THEM!!

Now that we know, LETS USE THEM!!

Now that we know, LETS USE THEM!!

Now that we know, LETS USE THEM!!

Now that we know, LETS USE THEM!!

Now that we know, LETS USE THEM!!

PG. 153 # 7, 9

EXIT: PG 153 # 8

Section 4: Parallel Does NOT matter how many parallel lines you have, the SAME rules apply! 1 3 2 4 7 5 6 8

Section 4: Perpendicular 13 4 2 If one is Perpendicular(=90 ), 0 Then ALL are 900

What is the measure of angle 4? ?

Find the measure of angle H and Y: oo 65 65 o Y