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Author:
Tsang Kin Fun Francis
GeoGebra
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兩組對邊相等的四邊形
画直线等分三角形的面积
錐體建築師
判斷球體
三位數除以一位數（一）
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指數函數與二次函數101.11.26
外接圓的心
標準分解式
S3 Inequality
微分量 (Differentials)
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Isosceles Triangles
Parametric Curves
Bar Chart or Bar Graph
Distributions
Derivative