The Toy That Explains the Pythagorean Theorem

Created by Charles Hartenstein, this toy explains one of the most fundamental principles of math using marbles.

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Ballet Rotoscope by Masahiko Sato | Video | Abakcus

Ballet Rotoscope

In “ballet rotoscope,” by extracting the movement of a dancing ballerina, Masahiko Satoh and his team created an animation of a locus drawn in the air and dancing geometric figures,…