This document defines and provides examples of different types of lines: intersecting lines cross at one point, parallel lines never intersect but are in the same plane, perpendicular lines form 90 degree angles, and skew lines lie in different planes and neither intersect nor are parallel. Students are asked to classify lines based on these definitions for lesson 7-4.

1. Name ______________________________________ Date _________________
Mrs. Labuski & Mrs. Rooney Period ___________ Lesson 7-4 Classifying Lines
VOCABULARY DEFINITION EXAMPLE
Lines that cross at one
INTERSECTING common point.
LINES
AB intersects CD
Lines in the same plane that
never intersect.
PARALLEL LINES
PQ  RS
Intersect to form 90° angles,
PERPENDICULAR or right angles.
LINES
MN ⊥ JK
Lines that lie in different
B
planes. They are neither A
SKEW LINES parallel nor intersecting.
C D
AB and CD are skew.

3. Name ______________________________________ Date _________________
Mrs. Labuski & Mrs. Rooney Period ___________ Lesson 7-4 Classifying Lines
VOCABULARY DEFINITION EXAMPLE
INTERSECTING
LINES
PARALLEL LINES
PERPENDICULAR
LINES
B
A
SKEW LINES
C D