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錯角---垂直平行綫
Author:
chanfushun
GeoGebra
New Resources
四邉形 (四年級) 教師版
找出對稱軸
三位數除以一位數（一）
兩位數除以一位數（一）
球體建築師
Discover Resources
正方體的反射對稱2
Sequence指令練習(n的平方根)
Geometric Circle
弓形塗顏色
正方形纸片剪出正三角形（顶点在边上）
Discover Topics
Cone
Inequalities
Normal Distribution
Integers
Numbers