很多几何题,看似平淡实则内涵丰富,我们若能巧妙地对它进行拓展、引申和变换,做到一题多证、一题多变、一题多探、一题多用,这些题目便会放出奇光异彩.本文就一道几何题,谈谈它的变式及应用.题目求证:等腰三角形底边上任意一点与两腰的距离之和等于一腰上的高. A lot of geometric questions, but seemingly plain but rich in content, if we can cleverly expand it, extend and transform it, to achieve a multi-card, a question changeable, a question and more exploration, a question and more, these topics will be Giving a whimsical, this article on a geometric problem, talk about its variants and applications.Project proof: the bottom of the isosceles triangle at any point and the distance between the two waist is equal to the height of a waist.