摘要
引入多边形有向面积的概念,得出平面上任意一点到多边形顶点的距离的平方与有向面积之积的和式的一组恒等式。
By introducing the concept about polygon＇s area vector, then get a set of identities,which is the summation of the square of the distance from any point in a plane to polygonal vertex and the dot product of area vectors.
出处
《常熟理工学院学报》
2005年第4期31-34,共4页
Journal of Changshu Institute of Technology
