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直线方程
Author:
杨晓晨
Topic:
Conic Sections
GeoGebra
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常见四边形是否是双心四边形
圓的基本性質
科赫雪花
活动三：应用性质
盈利與虧蝕
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基測試題旋轉
多項式
滑桿動畫
分項對消式的寫法的副本
椭圆的定义
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Histogram
Calculus
Linear Equations
Parametric Curves
Percentages