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congruent (SSA,RHS)
Author:
Ricky Chan
GeoGebra
New Resources
兩組對邊相等的四邊形
異分母分數減法
算柱 (兩位數)
四邉形 (四年級) 教師版
三位數除以一位數（一）
Discover Resources
同心圓和線段-2(最外圓大小固定)
小阿樂
定积分的概念
函数作图工具的副本
双曲线的定义
Discover Topics
Straight Lines
Similarity Transformation or Similarity
Equations
Parametric Curves
Curve Sketching