Parallel lines, transversals and angles

Section 3.1

1 2

5 63 4

910

1112

1314

15 16

7 8

Vertical angles

Linear pairs angles

Corresponding angles

Consecutive interior angles

Alternate interior angles

Alternate exterior angles

Identifying pairs of Lines and Angles Parallel lines: Two lines that do not intersect are either parallel lines or

skew lines; two lines are parallel if they do not intersect and are coplanar, always the same distance apart.

Skew lines: Two lines that do not intersect are either parallel lines or skew lines; two lines that do not intersect and are not coplanar

Parallel planes: Two planes that do not intersect are parallel planes; always the same distance apart.

Transversal: is a line that intersects two or more coplanar lines at different points.

Corresponding angles: When a transversal intersects two lines, corresponding angles are on the same side of the transversal and on the same side of the given line.

Alternate interior angles: when a transversal intersects two lines, alternate interior angles are on opposite sides of the transversal and on the same side of the given lines.

Alternate exterior angles: When a transversal intersect two lines, alternate exterior angles are on opposite sides of the transversal and on the outside of he given line.

Consecutive interior angles: (same side interior angles) a transversal intersects two lines, same side interior angles are on the same side of the transversal and on the inside of the given line.

Vertical angles: two angles whose sides form 2 pairs of opposite rays.

Practice Workbook

3.1pg 44(11-20)

Practice Workbook

3.1pg 44(1-10, 21-24)

Home work

Sec 3.1 – Identify Pairs of Lines and AnglesPage 150 (#3-15, 18-32) Due Tuesday.