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椭圆第一定义
Author:
wangyiyao
Topic:
Conic Sections
,
Ellipse
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
錐體建築師
【案例】2013年安徽高考15题
球体的体积推导（优化版）
球体的体积推导
Discover Resources
Drag the red dots, see the area ratio of EHFG to ABCD
ghseh 二次函數描點法頂點法-5
小六 平均數 (供教師講解用)
鉛筆畫圓
尺规作图_课本内容
Discover Topics
Percentages
Solids or 3D Shapes
Combinatorics
Plane Figures or Shapes
Square