所谓补全图形,就是将命题的整个图形或局部图形,经过添加适应的补助线,转化为它的特殊图形,即将多边形转化为三角形或特殊的四边形,将三角形转化为特殊三角形或平行四边形(内含菱形、矩形、正方形),从而使命题的隐含条件显露出来,继而命题获证.下面举出几例说明之. The so-called complementing graphics is the transformation of the entire graphic or partial graphic of a proposition, through the addition of adaptation aid lines, into its special graphics, that is, the polygon is converted into a triangle or a special quadrilateral, and the triangle is converted into a special triangle or parallelogram (inside With diamonds, rectangles, and squares, the implied condition of the mission question is revealed, and the proposition is certified. Here are a few examples to illustrate.