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GeoGebra Institute of WuXi
GeoGebra
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第八周作业
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
近似值：有效數字
兩組對邊相等和有直角的四邊形
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函數愛心
Centroid
題目
雙心運動
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Linear Programming or Linear Optimization
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Orthocenter