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求阴影部分的面积的题型涉及知识面宽、综合性强,这类题通常是将所求阴影部分的面积转化为求圆形、扇形、三角形等规则图形面积的和或差来进行求解.这类题型既有利于培养学生对图形的观察、分解、组合能力,又便于考查学生的综合计算能力与应变能力.现精
The problem of seeking the area of the shaded area involves a wide range of knowledge and strong comprehensiveness. Such questions usually solve the problem of converting the area of the shaded area into the sum or difference of the area of a regular pattern such as a circle, a sector and a triangle. This type of questions not only help students develop graphics observation, decomposition, combination ability, but also easy to examine the student’s comprehensive computing ability and adaptability.