Geometry pp 65-80 | Cite as


  • Serge Lang
  • Gene Murrow


In more elementary courses you have already studied the number line, and so you already know that once a unit length is selected, we can represent points on a line by numbers. In Figure 2.1 we have drawn such a line and a few points.


Vertical Line Horizontal Axis Number Line Simple Algebra Line Passing 
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Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • Serge Lang
    • 1
  • Gene Murrow
    • 2
  1. 1.Department of MathematicsYale UniversityNew HavenUSA
  2. 2.OssiningUSA

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