End of the Chapter

If you want to read more about points and lines, and how they cannot be defined, here are some references:

• Wikipeia article on point
• Wikipeia article on line
• Wikipeia article on undefined terms
• Why "point" and "line" are not defined.

You may wish to review the following. Click on a subject that interests you to go to where it was discussed.

• Points
• Lines
• Triangles
• Coordinate frames
• Determining Coordinates
• Effect of changing frames on coordinates
• Vectors
• Representing vectors

The next chapter continues the discussion of these topics.