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斜率乘积为定值（椭圆、双曲线）
Author:
蔡永志
Topic:
Ellipse
,
Hyperbola
斜率乘积为定值
GeoGebra
GeoGebra
New Resources
圓周公式的應用
斜率的值
垂直線的斜率
多邊形的面積
兩位數除以一位數（二）
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圓形的西洋棋盤
Conic section-ellipse&hyperbola
P53_3c
F2_Ch11.2_三角學(邊長與角的關係)
Copy of 正方體的反射對稱2
Discover Topics
Standard Deviation
Geometry
Power Functions
Means
Variance