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congruent (AAS) 3
Author:
Ricky Chan
GeoGebra
New Resources
拼砌四邊形
異分母分數減法
三位數除以一位數（二）
四邊形的特性
球体的体积推导（优化版）
Discover Resources
銳角三角函數值的大小比較
填色
Midpoint Theorem and Intercept Theorem
題10
函数作图工具的副本
Discover Topics
Quadrilaterals
Congruence
Multiplication
Prism
Incircle or Inscribed Circle