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正多邊形
Author:
曾昇維
GeoGebra
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直角坐標平面上的旋轉變換
畫出對稱圖形
異分母分數減法
柱體建築師
三位數除以一位數（二）
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分數與小數
funny draw
優良作品2(怡雯)
Example 2
凸透镜原理模拟
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Terms
Numbers
Fractal Geometry
Histogram
Similar Triangles