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鳩の巣原理_正方形（分割あり）
Author:
伊藤克典
GeoGebra
New Resources
対数螺旋
目で見る立方体の2等分
sine-wave
円の伸開線
standingwave-reflection-fixed
Discover Resources
円の内部で直交する2直線
３円交線中交点
相似の軸
等角等距離双曲線と三角形の心
身近に現れる関数y=ax^2
Discover Topics
Arithmetic
Random Experiments
Inequalities
Diagrams
Integral Calculus