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Author:
Cheung Kun
GeoGebra
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异形操场
第八周作业3
盈利與虧蝕
椭圆内切圆链
折扣
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商高定理之正三角形2
空間三坐標平面101.12.22
幾何變換
例子
阿波羅圓
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Calculus
Orthocenter
Intersection
Median Line
Logic