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bi li xian duan yu mian ji
Author(s): 
Pages: 25-26
Year: Issue:  12
Journal: Required Reading for Junior Middle School Students

Abstract: <正> 在几何题中,我们经常碰到有关比例线段与面积的问题.解决此类问题,需要依据“三角形中同高不等底的面积比等于它们的底的比”. 如图1,点B为线段AC上的一点,O为不在AC所在直线上的一点,则有S△AOB:S△BOC:S△AOC=AB:BC:AC.同样,我们还可以依据“等高不等底的三角形的面积比等于它的底的比”.
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