In the introduction to this site we learn that, "A fundamental result of geometry, used often in secondary and collegiate mathematics, is the equality of ratios of corresponding sides in similar triangles." Accordingly...
Math in the "real world" happens all the time, and it can involve everything from buying a car to following a simple (or complex) recipe. The "Math in Daily Life" site offers up a series of interesting ways to get...
An undergraduate tutorial on wallpaper groups, with illustrations of the 17 wallpapers groups and a wallpaper gallery. Technically, the derivation of all discontinuous groups of rotation and translation in the plane....
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