3.1 Flashcards
1
Q
Parallel Lines
A
Parallel lines are coplanar lines that do not intersect.
2
Q
Intersecting Lines
A
Intersecting lines are coplanar and have exactly one point in common.
3
Q
Oblique Lines
A
Lines are oblique if they intersect and do not form right angles.
4
Q
Skew Lines
A
Two lines are skew if they do not lie in the same plane and never intersect.
5
Q
Thm. 3.1 transitivity of parallel lines
A
If two lines are parallel to the same line, then they are parallel to each other.
6
Q
Thm. 3.2 property of perpendicular lines
A
If two coplanar lines are perpendicular to the same line, then they are parallel to each other.
