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外分点（１：４）
Author:
kyouko
Topic:
Constructions
GeoGebra
New Resources
対数螺旋
直線の軌跡
standingwave-plus
接点の作る円は内接円
小テスト
Discover Resources
楕円の性質Oval
マイナス２進法 The minus binary system
レム二スケート
因数分解の練習
波紋
Discover Topics
Prism
Conditional Probability
Congruence
Addition
Difference and Slope