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.

• point Points
• line Lines
• triangle Triangles
• coordinate frame Coordinate frames
• coordinates, determining Determining Coordinates
• change of frames Effect of changing frames on coordinates
• vector Vectors
• vector, representation Representing vectors

The next chapter continues the discussion of these topics.