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两个等腰三角形
Author:
孟宝兴
GeoGebra
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龙形曲线-分形龙
中华人民共和国国旗
百分數及其應用
斐波那契螺旋弧线（表格法-可动态调节）
撒针估算面积实验
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Bearings 方位
特殊線.ggb
Math Project
Travelling Waves
常见立体图形的截面
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Perimeter
Kite
Equilateral Triangles
Area
Functions