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向量点乘
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huhai463127310
GeoGebra
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平行線的斜率
兩位數加法
球体的体积推导
垂直線的斜率
漂亮的摇摆曲线
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常態分布和標準差 Normal Distribution and Standard Deviation
直角三角形斜邊上的高
ω对正弦函数图像的影响的副本
圆在直线上滚动
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Geometric Mean
Vectors
Solids or 3D Shapes
Quadratic Equations
Differential Equation