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足迹
Author:
孟宝兴
足迹
GeoGebra
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四邊形的特性
三位數除以一位數（二）
直角坐標平面上的旋轉變換
近似值：有效數字
找出對稱軸
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橢圓軌跡(兩同心圓)102.12.04
Irregular shape
三角形外心的位置
(003)80102史巧薇
Uses of Trigonometry
Discover Topics
Rotation
Parallelogram
Equations
Natural Numbers
Polynomial Functions