对几何学多年总结的经验推出以下几个观点定理,供广大同仁参考。发现数学规律:已知一个三角形作出内切圆和外接圆,在外接圆作出一个内接三角形,保持内接三角形的三条边与已知一个三角形作出内切圆相切。(具备一个条件如下:三角形的内切圆的直径除以三角 Many years of geometric experience summarized the following several theorems, for the majority of my colleagues for reference. Discovering Mathematical Rules: Knowing a triangle makes an inscribed circle and a circumscribed circle, makes an inscribed triangle in the circumcircle, and keeps the three sides of the inscribed triangle tangent to the circle that is known to be a triangle. (Have one of the following conditions: The diameter of the inscribed circle of the triangle divided by the triangle