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quadratic general form
Author:
chan hei
GeoGebra
New Resources
活动三：应用性质
撒针估算面积实验
异形操场
第八周作业2
第八周作业1
Discover Resources
商高定理3
三角形內切三圓
太极图
圓外切四邊形
數值滑桿動畫
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Special Points
Functions
Matrices
Cuboid
Trapezoid