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-1 ≤ cosA cosB cosC ≤ 1/8
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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直角坐標平面上的旋轉變換
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
GeoGebra笔记功能体验课件
算柱 (兩位數)
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GeoGebra与数学教育论坛通知
角平分線性質
∆ABD 面積 = ?
雙曲線2 交點法
鸚鵡螺旋線
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Polygons
General Quadrilateral
Vectors 2D (Two-Dimensional)
Addition
Planes