构造是几何解题中常用的技巧,它是根据题设条件或结论将原图形构造为特殊的几何图形,以沟通题设条件与结论之间的联系,从而达到快速解题的目的,下面分别举例说明. Structure is a commonly used technique in geometric problem solving. It constructs the original figure as a special geometric figure according to the conditions or conclusions of the questions, and communicates the connection between the conditions and conclusions of the questions, so as to achieve the purpose of solving problems quickly. for example.