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正方形的平行投影
Author:
宴华 石
GeoGebra
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盈利與虧蝕
平行線的判定
三角函数 的副本
圓的切線方程
比較五件物件的重量
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折扣 例4
內外角平分線
線性變換對圖形的影響
三次函數02
交錯弓形的圓周角
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Cuboid
Symmetry
Intersection
Linear Equations
Linear Programming or Linear Optimization