Math & Edu
kopfakrobaten:
Talenteförderung im technisch-naturwissenschaftlichen Bereich
Warum vertauscht ein Spiegel links und rechts (aber nicht oben und unten)??
3 Antworten!
GeoNext: tolle freie Software zur dynamischen Geometrie!
Mathe Online
RSA demo:
Principles of a public-key encryption system presented as easy to follow steps. Encrypt and decrypt your own "message" (one letter)!
Math & Fun
How to dissect, for instance, a square, such that the pieces can be
rearranged to a triangle? See here for a hinged wooden construction of this classical puzzle!
How to dissect a triangle, such that the pieces can be
rearranged to a hexagon? See here for several ways doing that, including
an original new one!
See one of my newest dissections: a partially hinged dissection with rotational symmetry from dodecagon to square!
Inspired by the above dissection (dodecagon to square) I found
a general way of dissecting a {3n} to {n}.
Dissection links
My interest in dissection puzzles was raised by
a nice set
of dissection puzzles
("Four Tricky Two-Way
Puzzles") from tesselations.com.
Further links:
Solve this tricky block sliding puzzle online!
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Last modified: May 21 2007