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椭圆的离心率
Author:
孟宝兴
GeoGebra
New Resources
画直线等分三角形的面积
找出對稱軸
判斷球體
第八周作业
三位數除以一位數（一）
Discover Resources
正三角形尺规作图
ggb-fs-b1
習作A三ch1_11
座標網格的複數映射
B6 二次函數
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Planes
Secant Line or Secant
Similar Triangles
Set Theory
Quadrilaterals