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MTH5151trytry
Author:
Chan Kong Chuen
GeoGebra
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画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
拼砌四邊形
兩位數除以一位數（二）
四邊形的特性
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waaachen
橢圓軌跡(兩同心圓)102.12.04
過點切圓的動圓圓心軌跡
旋转文本
圆面积的推导-开普勒法
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Parabola
Vectors
Variance
Circle
Division