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Spirography (the true Spirograph)

Author:Daniel Mentrard

Topic:Curve Sketching, Parametric Curves

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Trammel of Archimedes Art
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Sum of Squares: Proof without Words
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Fractal Tétraèdre. Dilatation -1/2 centre triangles

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Equal Angles at the centre stand on equal chords and arcs
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The Size of the Scale Factor: IM 7.1.5

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