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封閉區域填色
Author:
葉冠和
GeoGebra
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兩位數除以一位數（二）
異分母分數減法
三位數除以一位數（一）
畫出對稱圖形
錐體建築師
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Angles associated with Parallel Lines 平行線上的角
Quiz on Factorization of Quadratic Polynomials (Cross Method) 因式分解一元二次多項式(十字相乘法)：測驗
正弦公式(證明)
GeoGebra培训手册素材
Copy of 銳角三角：sin, cos
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Geometric Distribution
Variance
Boxplot
Orthocenter
Area