Download warmup Section 3.1: Properties of Parallel Lines

What is the complement of the supplement of a
134 degree angle?
After the warmup get 4 different colored
markers to share with your partner.
EQ: What are the properties of parallel lines?
A transversal is a line that intersects two
coplanar lines at 2 distinct points.
Types of angles:
Alternate Interior: angles between
two lines that are on opposite sides
of the transversal
1
2
4
4
3
3
Same-side interior: angles between
two lines on the same side of transversal
Corresponding angles: angles in the
Same general region
5
6
6
8
7
Alternate exterior angles: angles on opposite
sides of the transversal on the outside of the
two lines.
Same-side exterior
angles: angles on
the same side of
the transversal
on the outside of
the two lines.
If a transversal intersects 2 parallel lines, then
corresponding angles are congruent.
If a transversal intersects 2 parallel lines, then
the alternate interior angles are congruent.
(corresponding angles are congruent).
Prove m<3=m<1
4
3
1
m<1=m<4
m<4=m<3
m<3=m<1
Corres. angles
Vertical angles
substitution
Use the picture to help you guess…
Corrs. <‘s are ______
Alt. int. <‘s are _____
Same-side int. <‘s are ______
Same-side ext. <‘s are ______
Alt. Ext. <‘s are _______
p. 131-132, 1-18, 26,27