Escher

Reference Topics 9-3

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This site investigates the four-color problem:
https://mathshistory.st-andrews.ac.uk/HistTopics/The_four_colour_theorem/

A beautiful gallery of fractal designs are found on these sites:
http://fractals.hauner.cz/1

This site shows the colorful answer to Problems 24 and 25:
http://reglos.de/pentominos/

This site has many links:
https://mathshistory.st-andrews.ac.uk/HistTopics/fractals/

This site discusses … See the whole entry

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