在解答有关表面积、体积的问题时,有时候仅凭题中的文字是不易理解题意的,此时需要我们把题中的已知条件转化为易懂的图形,也就是“把题目画出来”。【例题】一个长方体的底面是边长为5厘米的正方形,它的表面积是210平方厘米,它的体积是多少?【思路点睛】要求长方体的体积,一般需要知道长方体的长、宽、高,或者知道底面积和高也行。但是仅 In answering the questions about the surface area and volume, sometimes it is not easy to understand the inscription only by the text in the question. In this case, we need to translate the known conditions in the question into an easy-to-understand graphic, that is, come out". 【Example】 a rectangular parallelepiped on the bottom surface is 5 cm square, its surface area is 210 square centimeters, its volume is what? [Ideas dot eye] requires the volume of the cuboid, the general need to know the length, width, height, Or know the bottom area and high also line. But only