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congruent (SSA,RHS)
Author:
Ricky Chan
GeoGebra
New Resources
異分母分數減法
判斷球體
球體建築師
找出對稱軸
球体的体积推导（优化版）
Discover Resources
路徑四動畫
錐台
ghseh 二次函數動畫左右平移
test
somacube
Discover Topics
Complex Numbers
Polygons
Congruence
Logarithmic Functions
Upper and Lower Sum or Riemann Sum