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等腰三角形是十分重要的三角形,但许多同学在解答这类问题时,常会因考虑不全面而导致漏解.实际上,我们在求解有关等腰三角形的问题时关键是要注意分类讨论.现列举相关中考试题予以说明.一、关于周长分割的讨论例1(2009呼和浩特)在等腰ABC中,AB=AC,一边上的中线BD将这个三角形的周长分为15和12两个部分,则这个等腰三角形的底边长为()
Isosceles triangle is a very important triangle, but many students in the solution of such problems, often due to incomplete consideration led to leakage. In fact, we solve the problem of isosceles triangle key is to pay attention to the classification discussion. In the isosceles ABC, AB = AC, on the side of the midline BD will be the circumference of the triangle is divided into two parts 15 and 12 , Then the bottom of the isosceles triangle length ()