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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
算柱 (兩位數)
Fibonacci Clock
直角坐標平面上的旋轉變換
判斷球體
近似值：有效數字
Discover Resources
parallelogram
思考題
GeoGeBra畫橢圓形的動態軌跡
Copy of 閱讀鐘面及數字鐘（時和分）
ppppp
Discover Topics
Polygons
Calculus
Rotation
Expected Value
Linear Equations