3.1 Lines and Planes Flashcards
1
Q
Intersecting lines
A
Intersecting lines are coplanar and have exactly one point in common.
2
Q
Oblique lines
A
Lines are OBLIQUE if they intersect and do not form right angles.
3
Q
Skew lines
A
Two lines are SKEW if they do not lie in the same plane.
4
Q
Theorem 3.1 (Transivity of parallel lines)
A
If two lines are parallel to the same line, then they are parallel to each other.
5
Q
Theorem 3.2 (Property of perpendicular lines)
A
If two coplanar lines are perpendicular to the same line, then they are parallel to each other.
6
Q
Parallel lines
A
Two lines are PARALLEL if they are coplanar and do not intersect.
