Chapter 3 Parallel and Perpendicular Lines
3.1 Identify Pairs of Lines and Angles
Goal • Identify angle pairs formed by three intersecting lines.
VOCABULARY
1.)Parallel lines
Two lines are parallel lines if they do not intersect and are coplanar.
2.)Skew lines
Two lines are skew lines if they do not intersect and are not coplanar.
3.)Parallel planes
Two planes that do not intersect are parallel planes.
4.)Transversal
A transversal is a line that intersects two or more coplanar lines at different points.
5.)Corresponding angles
Two angles are corresponding angles if they have corresponding positions.
6.)Alternate interior angles
Two angles are alternate interior angles if they lie between the two lines and on opposite sides of the transversal.
7.)Alternate exterior angles
Two angles are alternate exterior angles if they lie outside the two lines and on opposite sides of the transversal.
8.)Consecutive interior angles
Two angles are consecutive interior angles if they lie between the two lines and on the same side of the transversal.
Chapter 3
Lesson 1, Examples 1 Identify relationships in space,
Lesson 1, Examples 2Identify parallel and perpendicular lines
Lesson 1, Example 3 Identify angle relationships
