任何一个三角形的2D，3D ND点的面积和角度计算。这个简单的功能使用三点作为输入可以是二维，三维和…。并将计算区域和角度的三角形-Any of a triangle area and angle of the 2D and 3D ND point calculations. Simple functions use three points as input can be two-dimensional, three-dimensio