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大风车
Author:
吕胜
GeoGebra
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比較五件物件的重量
折扣
龙形曲线-分形龙2
椭圆内切圆链
异形操场
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橢圓軌跡加滑桿
Copy of 根據百分率找數量(一): 例2
y=a*sin(b*x)
橢圓3-平行四邊形法
F4_Ch9.1
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Numbers
Ellipse
Trigonometry
Parallelogram
Planes