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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
垂直線的斜率
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
第八周作业
三位數除以一位數（二）
Discover Resources
遊戲
ddsdsad
Pyramid and Cone1
中垂線
Drag A or X
Discover Topics
Mode
Integral Calculus
Distributions
Symmetry
Quadratic Equations