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畢氏定理1
Author:
吳桓萱
GeoGebra
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兩組對邊相等的四邊形
判斷球體
直角坐標平面上的旋轉變換
拼砌四邊形
四邉形 (四年級) 教師版
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Angle between a Line and a Plane 投影與線面角
Error (誤差)
ptccs2new
拋物線3--平行四邊形法
随机模拟实验（撒豆子估算π）的副本
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Dilation
Numbers
Rectangle
Vectors
Translation