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Archimedes' spiral
Author:
Bunryu Kamimura
Archimedes' spiral Curve(a t cos(t + α), a t sin(t + α), t, 0, 10π)
GeoGebra
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standingwave-reflection-free
直線の軌跡
アステロイド
standingwave-reflection-fixed
サイクロイド
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二つの正方形に divisible into two squares
逆中点三角形の作図（平行）
垂心と外心の対称性
魔方陣を作ってみよう３×３
どんな四角形になる？
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Congruence
Conic Sections
Tangent Function
Median Line
Algebra