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题目:王大伯家有一块平行四边形菜地,底100米,高30米,在菜地里挖了一个长方形水池,长20米,宽10米(如图1),王大伯要把剩下的菜地平均分成两份,分别种上西红柿和黄瓜,求黄瓜地的面积是多少?这道题看似很简单,只要把平行四边形菜地的面积减去水池的面积,再把剩下的菜地面积除以2即可。然而问题的关键是这块带有水池的菜地,如何才图1能被实际平均分成两份?因为水池的位置并不像大家所希望的那样正好在中间。怎样用一条直线将菜地和水池同时平均分成两份呢?要解决这个问
Title: Wang Dabo home has a parallelogram vegetable, at the end of 100 meters, 30 meters high, in the vegetable dug a rectangular pool, 20 meters long and 10 meters wide (Figure 1), Wang Dabo to the rest of the The vegetables are equally divided into two parts, which are planted with tomatoes and cucumbers respectively. What is the area for cucumber? The question seems simple. Simply subtract the area of the pond from the area of the parallelogram, Divide the area by 2. However, the crux of the problem is that this plot of water with a pool can be divided equally in two in Figure 1. Because the pool’s location is not exactly right, as you would expect. How to use a straight line vegetable and pool at the same time equally divided into two? To solve this question