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doublehelix
Author:
lamanleung
GeoGebra
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斐波那契螺旋弧线(表格法-可动态调节)
椭圆内切圆链
撒针估算面积实验
百分數及其應用
平行線的判定
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小学数学
總結
立體截面
COVID-19 折線圖
圆心可变的扇形在x轴上滚动
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Calculus
Sequences and Series
Mathematics
Perimeter
Constructions