在解答梯形问题时,常常通过添加辅助线使梯形中的问题转化为三角形、平行四边形、矩形等特殊图形的问题,进而达到化难为易,化未知为已知的目的.本文通过数例说明梯形问题中添辅助线的思考方法. When solving the trapezoidal problem, the problem of the trapezoid is often converted to a special problem such as a triangle, a parallelogram, or a rectangle by adding an auxiliary line, so that it becomes difficult to understand and the unknown is a known purpose. The method of adding auxiliary lines to the question.