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人教版数学教材九年级上册第26页的一道习题引发了我的思考:如图,要设计一个等腰梯形的花坛,花坛上底长100m,下底长180m,上下底相距80m,在两腰中点连线处有一条横向甬道,上下底之间有两条纵向甬道,各甬道的宽度相等,甬道的面积是梯形面积的六分之一,甬道的宽应是多少米(结果保留小数点后两位)?思考一:此习题常见错解分析错解1这类平面几何图形面积分割题目,有一种比较简单的解题方法,那就是图形平移法,部分师
PEP textbook ninth grade on page 26 of a problem triggered my thinking: Figure, to design an isosceles trapezoidal flower bed, flower bed at the end of the long 100m, bottom long 180m, up and down the bottom 80m apart, in the two Midpoint waist line has a horizontal corridor, there are two longitudinal corridor between the upper and lower base, the corridor width equal, the corridor area is one-sixth of the trapezoidal area, the width of the corridor is how many meters (the result of retaining the decimal point The latter two)? Thinking one: The common misunderstanding of the problem analysis misunderstanding 1 This type of plane geometry area segmentation problem, there is a relatively simple solution to the problem, that is, the graphic translation method, part of the division