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happy new year2
Author:
李春培
happy new year2
GeoGebra
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拼砌四邊形
柱體建築師
兩位數除以一位數（二）
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
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內切圓滾動有圖更新
台灣加油台灣加油
quadratic
例題1【凹口性分析】
劉徽的「割圓術」
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Mathematics
Statistics
Triangles
Logarithm
Similar Triangles