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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
判斷球體
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
GeoGebra笔记功能体验课件
【案例】2018年全国1卷理科12题
Discover Resources
Bearings 方位
【三角函數】sinx的平移
勝者即正義
椭球面
剪切成正三棱柱（制作：李三军，修订：孟宝兴）
Discover Topics
Arithmetic
Geometric Transformations
Vectors 3D (Three-Dimensional)
Straight Lines
Conic Sections