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直线与椭圆
Author:
lidonglin
焦点到直线的距离之积为定值b方则直线与椭圆相切
GeoGebra
New Resources
兩位數加法
球體建築師
GeoGebra笔记功能体验课件
球体的体积推导（优化版）
四邊形的特性
Discover Resources
三角形的三心觀察站
ray tracing of intraocular eye
labyrinth
數學傳播39卷4期, 平面幾何公式思考
congruent (SS) 2
Discover Topics
Geometric Distribution
Median Value
Cosine
Natural Numbers
Symmetry