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算数5 三角形の内角の和

Author:石田優耶
Topic:Angles, Arithmetic, Polygons, Triangles

New Resources

  • アステロイド
  • 円の伸開線
  • 対数螺旋
  • 等積変形2
  • 接点の作る円は内接円

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  • 例題230問題

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