我们在解题中,经常碰到求几个角的度数和的问题.从表面看题目似乎一个条件也没有,根本无法求出每个角的度数,无从下手,但只要我们将这几个角看成一个整体,将它们转化到一个多边形中,就可以利用多边形的内角和或者外角和,轻松得到答案.来看看几个具体的例子.一、如图,求∠A+∠B+∠C+∠D+∠E的度数. In solving problems, we often encounter the problem of finding the degrees of several angles and seemingly have no qualifications on the surface. We can not find the degree of each corner and we can not start with it. However, Think of them as a whole and convert them into a polygon, and you can easily get the answer using the polygons’ interior and exterior angles. Let’s look at a few concrete examples. First, as shown in the figure, find ∠A + ∠B + ∠C + ∠ Degrees of D + ∠E.