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20161223 第10題
Author:
3A516057 練鴻裕
GeoGebra
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科赫雪花
盈利與虧蝕
撒针估算面积实验
球体的截面
中华人民共和国国旗
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阿波羅尼斯圓
封閉區域著色
直角
分數乘法3
百分數及其應用
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Translation
General Quadrilateral
Equilateral Triangles
Tangent Function
Means