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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
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GeoGebra笔记功能体验课件
三位數除以一位數（一）
兩位數除以一位數（一）
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
Discover Resources
周界-平移法(練習三)
彩色包絡球
Rotation in the Coordinate Plane
不存在的梯子
加法002结果(20以内)
Discover Topics
Cuboid
Root
Scalene Triangles
Integral Calculus
Means