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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
常见四边形是否是双心四边形
龙形曲线-分形龙
龙形曲线-分形龙2
平行線的斜率
正方形雪花图案
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作業
Inclination and Gradient(傾角和斜率)
軌跡 直線 (與兩平行線等距)
sin(x) 的函數圖形的副本
連連看！橢圓在哪裡？
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LCM and GCD
Line Segment
Parallelogram
Stochastic Process or Random Process
Linear Functions