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GeoGebra
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四邊形的特性
球体的体积推导
異分母分數減法
柱體建築師
画直线等分三角形的面积
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自行车运动
三角函數圖解
教學－面與面的夾角
正弦函数图象的形成
八卦限
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Equilateral Triangles
Real Numbers
Frequency Distribution
Tangent Function
Line Segment