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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
找出對稱軸
球体的体积推导(优化版)
判斷球體
異分母分數減法
四邉形 (四年級) 教師版
Discover Resources
底數小於1的指數變化
弧度
共頂點、底共線
橢圓的定義(by Jutor)
我的第一个GGB绘本
Discover Topics
Arithmetic Mean
Difference and Slope
Geometric Mean
Circle
Triangles