我试图用顶点来计算三角形的面积。
{{0,1000000000},{1,0},{0,-1000000000}}
很容易看出,这个三角形的面积应该是1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,0