实质追索三角形是一种简单而又常见的基本图形 .在生产和生活中 ,形状为三角形结构的处处可见 .例如 ,大桥的钢梁 ,起重机的支架 ,房顶的框架 ,照相机的三脚支架等等 ,都给我们以三角形的具体形象 .因此 ,学习三角形将帮助我们更好地认识世界 ,从而给生产和生活带来莫大的好处 The physical recourse triangle is a simple and common basic pattern. In production and life, the shape of the triangle structure is everywhere. For example, the steel beam of the bridge, the bracket of the crane, the frame of the roof, the tripod bracket of the camera, etc. And so on, it gives us a concrete image of the triangle. Therefore, learning the triangle will help us to better understand the world and bring great benefits to production and life.