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足迹
Author:
孟宝兴
足迹
GeoGebra
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球體建築師
錐體建築師
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
四邊形的特性
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數學作業
橢圓與雙曲線折紙
Single Line Deflection
拋物線的疊合
不等式組
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Probability
Tree Diagrams
Similar Triangles
Diagrams
Optimization Problems