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鳩の巣原理_正方形（分割あり）
Author:
伊藤克典
GeoGebra
New Resources
二次曲線と離心率
standingwave
目で見る立方体の2等分
sine-wave
等積変形2
Discover Resources
三角柱の展開図
放物面における光線の反射
線対称（万華鏡）
逆行列
切頂１２面体
Discover Topics
Algebra
Upper and Lower Sum or Riemann Sum
Linear Regression
Frequency Distribution
Step Functions