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椭圆的两条垂直切线的交点轨迹
Author:
istone
Topic:
Ellipse
,
Geometric Transformations
GeoGebra
New Resources
【案例】2013年安徽高考15题
三位數除以一位數（一）
球體建築師
球体的体积推导
球体的体积推导（优化版）
Discover Resources
柏拉圖宇宙模型
索瑪立方體
任意角的生成
Oscillations
任意角
Discover Topics
Arithmetic
Similar Triangles
Frequency Distribution
Straight Lines
Quadratic Equations