theorem 毕氏定理的逆定理 Angle sum of polygon = ∠sum of polygon 多边形内角和 Sum of exterior angles of polygon = sum of ext. ∠s of polygon 多边形外角和 .
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sum of polygon
多边形和
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Utilizing the extension of the polygon exterior angle sum theorem, directions of curvilinear polygons were judged and redundant polygons were deleted.
利用多边形外角定理的推广，判断偏置后曲线多边形的旋向，删除多余多边形。
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