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旋轉正方形
Author:
33陳郁婷
GeoGebra
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兩組對邊相等的四邊形
三位數除以一位數（一）
【案例】2013年安徽高考15题
兩位數加法
畫出對稱圖形
Discover Resources
優良作品1(沛綺)
外角和
Copy of 固定周界的長方形的面積變化
蜥蜴
星形线-Astroid Curve-with-Envelope Command
Discover Topics
Perimeter
Coordinates
Quadratic Equations
Special Points
Unit Circle