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congruent (AAA) 2
Author:
Ricky Chan
GeoGebra
New Resources
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
球体的体积推导（优化版）
兩位數加法
三位數除以一位數（二）
Discover Resources
Expectation Value 期望值
等弦則等弦心距
Copy of 軸對稱
圓柱圓錐
柱體建築師
Discover Topics
Centroid or Barycenter
Multiplication
Definite Integral
Hypergeometric Distribution
Rotation