Euclid

Reference Topics 7-1

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Euclid’s Elements can be found at:
http://aleph0.clarku.edu/~djoyce/java/elements/elements.html

These sites give some great examples of symmetry.
http://www.mcescher.com/?s=symmetry

Problem 1 presents an optical illusion. If you like this sort of problem you might enjoy checking out this site.
http://www.billiardworld.com/puzzles.html

You might be … See the whole entry

Section 7.1: Geometry

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7.1 Outline

  1. Greek (Euclidean) geometry
    1. undefined terms
      1. point
      2. line
      3. plane
      4. surface
    2. categories
      1. traditional (Euclidean) geometry
      2. transformational geometry
    3. Euclid’s postulates
      1. postulate
      2. axiom
      3. theorem
      4. five postulates
    4. parallel lines
    5. non-Euclidean geometries
    6. straightedge
    7. line segment
    8. congruent figures
    9. construct a figure
      1. construct a circle
      2. construct
… See the whole entry