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一元二次方程式-應用問題(兩圓相切)
Author:
均一
GeoGebra
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球體建築師
柱體建築師
四邊形的特性
直角坐標平面上的旋轉變換
小数 的副本
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Reflectional Symmetry 反射對稱
代數運算：外心座標
vbvbvbvc
拼圖2
算盘
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Straight Lines
Natural Numbers
Hypothesis Testing
Matrices
Median Line