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勾股树
Author:
谢鹏
GeoGebra
New Resources
異分母分數減法
兩位數加法
球体的体积推导（优化版）
拼砌四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
藝術著色2
直線排列 4
四塊面積
圓與切線
乘法加工
Discover Topics
Exponent
Incircle or Inscribed Circle
Symmetry
Quadratic Equations
Variance