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圆展开---探究圆周率
Author:
陈宜红
GeoGebra
New Resources
百分數及其應用
斐波那契螺旋弧线（表格法-可动态调节）
双心四边形
撒针估算面积实验
正方形雪花图案
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座標工具檔
三角形數
Apollonius Problem gergonne 4
Features from Vertex form
-1 ≤ cosA cosB cosC ≤ 1/8
Discover Topics
Mathematics
Reflection
Power Functions
Polygons
Equilateral Triangles