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在平面几何中,用三角方法证题、解题,常常会收到良好的效果.因为运用三角方法,往往便于思考,而且由于三角公式较多,内在联系密切,证题,解题不仅速度快,而且准确度高.另外,在一般情况下,利用三角方法证题、解题,所作的辅助线也较简单,多数只要将多边形划分成若干个三角形,或者作出一些三角形的高(垂线)构成直角三角形.
In the plane geometry, using the trigonometry method to test questions and solve problems often leads to good results. Because of the trigonometry method, it is often easy to think, and because there are more triangular formulas, the internal relations are close, the questions, and the problem solving are not only fast , And high accuracy. In addition, under normal circumstances, the use of the triangulation method, problem solving, the auxiliary line is also relatively simple, most of the as long as the polygon is divided into a number of triangles, or to make some of the height of the triangle (perpendicular) Form a right triangle.