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Author:
李春培
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GeoGebra
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四邊形的特性
找出對稱軸
球体的体积推导（优化版）
錐體建築師
兩位數加法
Discover Resources
Roger Test Draw
分數乘法與除法
空間中正立方體
Quiz on Mixed Arithmetic Operations of Positive Integers 正整數四則混合運算：測驗
平移中心
Discover Topics
Hypergeometric Distribution
Percentages
Geometric Transformations
Translation
Matrices