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欧几里得几何中,等边多边形是指每条都一样长的多边形。如果这个多边形的也都相等,那么它是一个正多边形。等边三边形及等边四边形一定是凸多边形,边长超过四的等边多边形可能是凸多边形,也可能是凹多边形或是自相交的多边形英语list of self-intersecting polygons

等边三角形也会是正三角形。等边四边形即为菱形(其中也包括了正方形)。

参见

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