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練習
Author:
夏天
練習
GeoGebra
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兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
兩位數加法
拼砌四邊形
四邉形 (四年級) 教師版
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優良作品1
約分BB
anlge at centre twice angle at circumference
畢氏定理
莱诺三角形 Reuleaux Triangle及其特性
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Matrices
Quadratic Equations
Root
Fractions
Boxplot