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椭圆的两条垂直切线的交点轨迹 蒙日圆
Author:
冯伟冀
,
istone
Topic:
Ellipse
,
Geometric Transformations
GeoGebra
New Resources
美國國旗 (Codex 版)
拼砌四邊形
Earth with coastline
兩組對邊相等和有直角的四邊形
近似值：有效數字
Discover Resources
尺規作圖找有理數點(以3分之5為例)
分割
總結
橢圓代數性質,光學性質,生活應用
operations of matrix 2rd ver
Discover Topics
Arithmetic Mean
Tree Diagrams
Rhombus
Definite Integral
Tangent Function