阴影部分图形分规则的和不规则的两种。求其面积时,前者只须代入相关公式,后者一般要考虑它是哪些规则图形的组合。但数学问题往往是变化的,在很多特殊情形下,上述两种方法未必简单可行。同学们在学习过程中只有结合实际,采取机动灵活的解题策略,才能激活解题思维,突破难点。 The shaded parts are divided into two types: regular and irregular. When seeking its area, the former only needs to be substituted into the relevant formula, and the latter generally considers which combination of regular patterns it is. However, mathematics problems often change. In many special cases, the above two methods are not necessarily feasible. Students in the learning process can only activate the problem-solving thinking and break through the difficulties by adopting a flexible and flexible problem solving strategy.