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兩組對邊相等的四邊形
拼砌四邊形
GeoGebra笔记功能体验课件
兩位數加法
柱體建築師
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winter vacation homework 12
貝氏曲面
Triangular Prism 三角柱體
GGB4
這是什麼角？的副本
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Similar Triangles
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