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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
拼砌四邊形
找出對稱軸
三位數除以一位數（一）
第八周作业
異分母分數減法
Discover Resources
函數邏輯式
exp. functions
Ex (RHS)
F1 Chapter 8 - Rotation in Coordination Plane(Advanced)
我的第一个GGB绘本
Discover Topics
Geometric Transformations
Isosceles Triangles
Pie Chart or Circle Chart
Upper and Lower Sum or Riemann Sum
Polygons