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Author:
町田貴司
GeoGebra
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対数螺旋
standingwave-reflection-fixed
standingwave
接点の作る円は内接円
standingwave-plus
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ピタゴラスの定理の拡張 Pythagorean extension theorem
アドバンス189
三角関数の合成
算法天生法指南二之巻(39)解答
完全四角形の外接円は一点（焦点）で交わる
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Straight Lines
Polygons
Trigonometric Functions
Geometric Distribution
Arithmetic Operations