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figure_Q_17
Author:
早苗雅史
GeoGebra
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sine-wave
接点の作る円は内接円
アステロイド
円の伸開線
直線の軌跡
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動く長方形
第２章問３１
回転体（②円）
中3二次関数の最大と最小y=ax^2
つなぎ折鶴 楽々波
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Line Segment
Tangent Line or Tangent
Geometry
Division
Diagrams