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congruent (SSS) 2
Author:
Ricky Chan
GeoGebra
New Resources
兩位數除以一位數（一）
錐體建築師
兩位數加法
畫出對稱圖形
算柱 (兩位數)
Discover Resources
文氏圖
四下_認識小數(學生版)
中國火柴遊戲一的副本
GeoGebra成像规律的演示
角的介紹 | Introduction to Angles
Discover Topics
Intersection
Combinatorics
Conditional Probability
Pyramid
Linear Programming or Linear Optimization