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Fold the rectangle.(長方形の折り返し 相似)

Author:okyota
Topic:Angles, Constructions, Diagrams, Geometry, Mathematics, Plane Figures or Shapes, Rectangle, Rotation, Similar Triangles, Similarity Transformation or Similarity, Geometric Transformations

First, [start/next] → [move the slider].  ※ 画面では ∽ → ~ (チルダ)になっています。(欧米仕様)

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