平面上有一个三角形,用两个向量描述,记作A、B，怎样求三角形的面积？
Let's start with a triangle in the plane Well, then we need two vectors to describe it say A and B here. How do we find the area of a triangle?
推导了轴对称线性三角形元的影响系数矩阵和输入向量公式；
The influence coefficient matrix of the linear axisymmetric triangular element and the input vector expression are derived.
应用两个向量法相关公式探讨了三角形重心、垂心、外心以及内心之间的距离公式。
This paper explores into the distance formula between median point, orthocenter, circumcenter and inner point of triangle by means of two related formulas of vector methods.
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