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S11G7 萬年曆
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学用数学
GeoGebra
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盈利與虧蝕
第八周作业2
第三周作业效果演示
第八周作业1
撒针估算面积实验
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正n邊形的組合
三圓相切
平行線的截線性質
圓形重疊問題
榔头和它的展开图
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Trigonometry
Subtraction
Prism
Equations
Scalene Triangles