3.1-3.2 Flashcards
Intersecting lines
Coplanar and have exactly 1 point in common
Oblique
Intersecting lines I do not meet at a right angle
Skew lines
Two lines are skew if they do not lie in the same plane
Transitivity parallel lines
If two lines are parallel to the same line, then they are parallel to eachother
Property of perpendicular lines
If two coplanar lines are perpendicular to the same line, then they are parallel to each other
If two distinct lines intersect…
Then their intersection is exactly 1 point
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
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
Parallel lines
Coplanar lines that do not intersect
