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黃斌
GeoGebra
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椭圆内切圆链
斐波那契螺旋弧线(表格法)
双心四边形
第八周作业2
平行線的判定
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拋物線作圖Ex1
三角形的分割與組合(2)
vector
P.6 圓周4A
橢圓軌跡
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Percentages
Derivative
Dilation
Diagrams
Mathematics