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9.1 - 直角座標上的三角比
Author:
W.L. Wong, Albert
GeoGebra
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兩位數除以一位數（二）
判斷球體
兩組對邊相等和有直角的四邊形
拼砌四邊形
GeoGebra笔记功能体验课件
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proof92吳冠穎
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