有关圆的阴影部分的面积,既可以根据图形的特点,将其分解转化为扇形、弓形、三角形、平行四边形、梯形等图形的组合来求解,也可根据其特点,灵活巧妙地运用一些方法技巧,可使问题化繁为简,化难为易,收到事半功倍的奇效,现略举几例解析如下,供同学们参考。 Regarding the area of ​​the shaded part of the circle, it can be based on the characteristics of the graph, and its decomposition can be converted into a combination of fan-shaped, arc-shaped, triangular, parallelogram, trapezoidal, etc. graphics to solve, but also according to its characteristics, flexible and clever use of some method skills , Can make the problem simple and complex, difficult to change, and get a lot of miraculous results, now give a few examples of analysis as follows for the students to refer to.