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幾何明珠2-5
Author:
bigbirdjack
GeoGebra
New Resources
平行線的判定
百分數及其應用
科赫雪花
斐波那契螺旋弧线（表格法-可动态调节）
撒针估算面积实验
Discover Resources
廣義三角函數
優良作品4(薇如)
three circle touching each other
Rotational symmetry examples
凸多边形在直线上的滚动
Discover Topics
Integral Calculus
Cosine
Cube
Percentages
Calculus