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z20联盟数学考试第七题
Author:
赵林
GeoGebra
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三位數除以一位數（一）
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
畫出對稱圖形
找出對稱軸
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直線之美
Similar triangles in a triangle
空間座標系
完整地球儀
畢氏定理
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Area
Rectangle
Intersection
Cone
Subtraction