一般有关和量的証題,如a+b=c的类,这里a,b,c表同类的量,常利用“分解法”或“合并法’,即于c量中,取一部分等于a(或b),而証其剩余的部分等于b(或a),这是“分解法”,或把一量a(或b)扩大(线段是利用延長办法,角是取其隣角)增加一量b(或a)后成一新量a′(即造成a′=a+b),然后証明a′=c,这是“合并法”。 Generally related to the amount of evidence, such as a + b = c of the class, where a, b, c table of the same type of quantity, often use the “decomposition method” or “merge method”, that is, in the amount of c, take a part equal to a (or b), and the remaining part of the certificate is equal to b (or a), which is the “decomposition method”, or an increase in the amount of a (or b) (the line segment is an extension, the angle is taken from its neighbor). A quantity b (or a) becomes a new quantity a’ (ie, a’ = a + b), and then a’ = c, which is the “merger method.”