| A | B |
|---|
| Postulate 5 | A line contains at least 2 points; A plane contains at least 3 poitns, not all in one line; space contains at least 4 points not all in one plane |
| Postulate 6 | Thourgh any 2 points there is exactly one line |
| Postulate 7 | Through any 3 points there is at least one plane, and through any non-collinnear points there is at least one plane |
| Postulate 8 | If tow points are in a plane then the line that contains those two pints is in that plane |
| Postulate 9 | If 2 planes intersect, then their intersection is a line |
| Theorum 1-1 | If 2 lines intersect, then they intersect at exactly one point |
| Theorum 1-2 | Through a line and a point which is not in the line, there is exactly one plane |
| Theorum 1-3 | If two lines intersect, then exactly one plane contains the lines. |
