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Author:
李春培
GeoGebra
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三位數除以一位數（二）
拼砌四邊形
兩組對邊相等和有直角的四邊形
畫出對稱圖形
柱體建築師
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中考数学压轴题大放送之十四
掃描不等式圖形
固定周界的長方形面積變化
蝴蝶定理动态演示
三角形三边关系探究
Discover Topics
Tree Diagrams
General Quadrilateral
Real Numbers
Mathematics
Set Theory