2.3 practice
in exercises 1-6, use the diagram to write an example of the postulate.
1. two point postulate (postulate 2.1)
2. line-point postulate (postulate 2.2)
3. line intersection postulate (postulate 2.3)
4. three point postulate (postulate 2.4)
5. plane-point postulate (postulate 2.5)
6. plane-line postulate (postulate 2.6)
in fyercises 7-9, sketch a diagram of the description.