| A | B |
|---|
| collinear | Points that are all on the same line. |
| coplanar | Points, lines, or shapes that are all in the same plane. |
| segment | A part of a line that contains 2 endpoints and all the points between them. |
| postulate | A statement (basic assumption) that is accepted without proof. |
| theorem | A statement that can be proved. |
| midpoint | The point that divides a segment into 2 congruent segments. |
| congruent | same size and same shape |
| bisector | A line, ray, sepment, or plane that intersects a segment at its midpoint. |
| line | Extends infinitely in 2 directions. |
| plane | a flat surface that extends infinitely in ALL directions. |
| ordered pair | (x, y) |
| noncollinear | Points that are NOT all on the same line. |
| definition of a midpoint | If M is the midpoint of AB, then AM=MB. |
| line AB |  |
| segment AB |  |
| distance between A and B |  |
| Segment Addition Postulate | If Q is between P and R, then PQ + QR = PR. |
| Midpoint Theorem |  |
| Midpoint Formula |  |
| Distance Formula |  |
