在进行“求组合图形的面积”的总复习时进行过下列题组的教学:图中两个图形的面积相等,部分重叠在一起,求阴影部分的面积。(单位:厘米)根据已知条件,阴影部分的面积是直接求不出来的。如第一个图形必须根据两个直角三角形的面积相等,部分重叠在一起,把阴影部分的面积转化成梯形ABCD的面积来求。在把第一个图形作为例题进行 The following topics were taught during the general review of “Area of ​​Combo Shape”: The two figures in the figure are equal in area and partially overlapping to find the area of ​​the shaded area. (Unit: cm) Based on known conditions, the area of ​​the shaded area is not directly available. If the first figure must be based on the area of ​​two right triangles equal, partially overlapping, the shadow of the area into the area of ​​the trapezoidal ABCD to find. Take the first figure as an example