Lines & Planes
Parallel line
lines that run in the same direction (path) but never touch - they are the same distance apart at all times (because they have the same slope)
Transitive property
If a=b and b=c then a=c
Corresponding angles
Same "spot" different line
Consecutive exterior angles or same side exterior angles
On one side of the transversal on the exterior.
Parallel planes
Planes that do not intersect - (run in the same direction, equal distance apart)
parallel postulate
If there is a line and a point not on a line then there is exactly one line from the point parallel to the given line
Vertical angles
On an intersecting line and shared common vertex
Consecutive interior angles or same-side interior angles.
On one side of the transversal in the interior.
Perpendicular lines
Lines that intersect each other and continue forever
Transitive property of parallel lines
If two lines are parallel to the same line then they are parallel to each other
Alternate interior angles
Inside the parallel lines and form a z
Skew lines
Non coplanar lines that will never intersect and are not parallel
Perpendicular postulate
If there is a line and a point not on a line then there is exactly one line through the point perpendicular to the given line
Alternate exterior angles
The outside of the parallel lines (AKA the BUN)
Transversal line
A line that intersects a system of lines
Supplementary angles
Linear pairs