如我上面所提到的，我们可以将三角形的类型按照角度或边来分类，在某些情况下，我们提供的三个数值也许不能组成三角形。
As I noted above, we can classify triangle types by angles or sides, and in some instances the three Numbers we supply may not form a valid triangle.
传统铁三角的三个顶点转变为“敏捷三角形”的一个顶点，被称为约束。
The three vertices of the iron triangle collapse into one vertex of the Agile triangle called constraints.
你可以使用初等的几何知识例如三角形的三个内角各为180度和三角形全等的规则(边-角-边等)。
You may only use elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.).
应用推荐