如果三角形的三个角的度数是10的整数倍,三角形内一点与三角形的三个顶点分别连结后,得到的所有的角也都具有这个性质,我们称这样的点为三角形的格点.同学们在初中学习时,求解此类问题的过程中,颇费周折地引一些辅助线才能解决.而学习三角知识后,既不用作辅助线,解决的方法又非 If the degree of the three corners of the triangle is an integer multiple of 10, one point in the triangle is connected to the three vertices of the triangle, and all the angles obtained have this property. We call this point a triangle lattice. When we were studying in junior high schools, we were struggling to solve some problems in the process of solving such problems. After learning the triangular knowledge, we did not use it as an auxiliary line.