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数学勾股定理
Author:
xuhao
GeoGebra
New Resources
双心四边形
百分數及其應用
异形操场
撒针估算面积实验
龙形曲线-分形龙
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二元一次聯立方程式圖解
周界
四角錐體的截面
地球儀
圆柱展开成平行四边形2
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Trapezoid
Fractions
Equations
Volume
Prism