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ch14 p.30#31
Author:
Ms HCF
GeoGebra
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圓的切線方程
百分數及其應用
祖冲之的期望：内棋与外棋
空间中两直线的位置关系
直線的斜率：水平變化 & 鉛垂變化
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正方體的旋轉對稱
Circle
球的内接三棱锥
平行四边形
解不等式
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Geometric Transformations
Tangent Function
Conic Sections
Definite Integral
Conditional Probability