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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
拼砌四邊形
球體建築師
兩位數除以一位數（一）
異分母分數減法
畫出對稱圖形
Discover Resources
Apollonius Problem 5 CPP pocelet
ghseh 二次函數的開口方向
Multiplication of Polynomials(多項式的乘法)
功課'
圆的面积展开的副本
Discover Topics
Solids or 3D Shapes
Special Points
Vectors
Prism
Circle