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我们已经知道长方体的体积等于它的长、宽、高三个测度的乘积,而长与宽的乘积就是它的底面积。因此,也可以说长方体的体积等于它的底面积和高的乘积。长方体是特殊的一种柱体。而一般柱体都可以通过切割选加转化为长方体。因此,一般柱体体积的计算公式,可以从长方体的体积V=sh,推导出一般柱体体积等于底面积乘以高。这一公式只能反映出一般柱体的共性,而通过底面积却能反映出各种不同形状的柱体,也就是说,一般柱体的个性。因此要求学生能掌握一般柱体的求
We already know that the volume of a cuboid is equal to the product of its three measures of length, width and height. The product of length and width is its bottom area. Therefore, it can also be said that the cuboid has a volume equal to its bottom area and its high product. Cuboid is a special type of cylinder. The general cylinder can be selected by cutting into rectangular box. Therefore, the calculation of the general cylinder volume can be deduced from the cuboid volume V = sh, that the general cylinder volume is equal to the bottom area times the high. This formula can only reflect the generality of the general column, but through the bottom area but can reflect a variety of different shapes of the cylinder, that is, the general personality of the cylinder. Therefore require students to master the general requirements of the cylinder