Chapter 3 – Perpendicular and Parallel Lines
Section 3.1 – Lines and Angles
*Watch this video to give you a better grasp of the concepts listed below.*
Parallel Lines:
Skew Lines:
Parallel Planes:
Postulate 13: Parallel Postulate
If there is a line and a point not on the line, then there is exactly one line through the point parallel to
the given line.
Postulate 14: Perpendicular Postulate
If there is a line and a point not on the line, then there is exactly one line through the point
perpendicular to the given line.
Transversal:
* The angles formed by the two lines and a transversal are given special names
corresponding angles:
alternate exterior angles:
alternate interior angles:
consecutive interior angles:
consecutive exterior angles: