割与补江苏省海门市海南中学汤文卿近年国内外数学竞赛中出现的某些几何问题，仅根据图形所展示的信息求解十分繁难，甚至无从下手．这时若巧妙地将原图形进行再加工，实施“分割”或“补形”，使不规则图形、一般图形化为规则的特殊图形，再利用所得新图形求解，思路易寻... Cutting and Complementing Tang Wenqing, Hainan High School, Haishu City, Jiangsu Province Some of the geometric problems that have emerged in the math contests at home and abroad in recent years are very difficult to solve based on the information displayed in the graphs. At this time, if the original graphics are subtly reprocessed, “segmentation” or “complementation” is implemented to make the irregular graphics and general graphics into regular special graphics, and then the new graphics are used to solve the problems. The idea is easy to find...