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sin(x) 的函數圖形
Author:
sansam
GeoGebra
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平行線的判定
百分數及其應用
折扣
异形操场
双心四边形
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Symmetric 設計對稱圖案(一條對稱軸)(垂直)
類正五邊形摺法
面積3
ttttt
我的第一个GGB绘本
Discover Topics
Ellipse
Complex Numbers
Parametric Curves
Curve Sketching
Optimization Problems