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下面两道求三角形面积的几何题,同学们往往感到困难。若能适当地利用填补变换,构造出一个方便于求面积的新图形,则问题就变得容易求解了。
In the following two geometry questions of the triangle area, the students often feel difficult. If the padding transformation can be properly used to construct a new graphic that is convenient for the area, then the problem becomes easy to solve.