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Author:
昌SIR
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GeoGebra
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四邊形的特性
找出對稱軸
畫出對稱圖形
拼砌四邊形
兩位數除以一位數（一）
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HW3.NationalFlag
S2,3,5 Statistics
三角柱算體積(可以切開)
三角形的垂心
連連看！橢圓在哪裡？
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Symmetry
Isosceles Triangles
Parametric Curves
Histogram
Logic