| A | B |
|---|
| point | Has no size, occupies no space. |
| line | Has length, but no width or thickness. |
| plane | Has length and wideth, but no thickness. |
| 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. |
| definition | A statement of the meaning of a word, phrase, or concept. |
| midpoint | The point that devides a segment into 2 congruent segments. |
| congruent | Having equal measures. |
| bisector | A line, ray, sepment, or plane that intersects a segment at its midpoint. |
| line | Extends indefinitely in 2 directions. |
| plane | Extends indefinitely in ALL directions. |
| plane | Can be represented by a flat surface. |
| ordered pair | (x, y) |
| ordered pair | Defines a specific point on the coordinate plane. |
| noncollinear | Points that are NOT all on the same line. |
| midpoint | M is the mipoint of AB if M is between A and B, and AM=MB. |
| line |  |
| segment |  |
| distance between A and B |  |
| Segment Addition Postulate | If Q is between P and R, the PQ + QR + PR and vice versa. |
| Segment Addition Postulate | The sum of the parts equals the whole. |
| Midpoint Theorem |  |
| Midpoint Formula | average of the endpoints |
| Midpoint Formula |  |
| Distance Formula |  |
| Segment Addition Postulate |  |
| Distance Formula | a loooong square root sign with a plus wign in the middle, 2 sets of parentheses, each one squared, take the difference of the x's and the difference of the y's, ... |
