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求阴影部分面积是小学数学教学中常见的题型.教学中,可以利用组合图形中各个基本图形之间的关系,利用割补的方法,利用平移和旋转等方法求阴影部分的面积.
Seeking shaded area is a common problem in primary school mathematics teaching, you can use the combination of the basic graphics in the relationship between the use of the method of complementarity, the use of translation and rotation methods such as the shading area.