论文部分内容阅读
与直角三角形有关的问题是中考的热点题型,其题型灵活多变,特别是与二次函数结合,使题目难度增加.利用直角构造相似基本图形,从而找到等量关系,这一方法往往可以帮助我们发现解题思路.以下通过一道中考试题加以分析说明.一、典型例题例1(2015年东营中考题)如图1,抛物线经过A(-2,0),B(-1/2,0),C(0,2)三点.(1)(2)略.(3)设点M是抛物线的顶点,试判断抛物
The problems associated with right-angled triangles are the hottest questions in the senior high school entrance examinations, whose types of questions are flexible and flexible, especially when combined with quadratic functions to increase the difficulty of the questions.It is easy to find similar relationships by constructing similar basic figures at right angles Can help us find the problem solving ideas. The following by a test questions to be analyzed and explained. A typical example 1 (2015 Dongying exam questions) Figure 1, the parabola after A (-2,0), B (-1/2 , 0), C (0,2) three points (1) (2) omitted (3) set point M is the vertex of the parabola, try to judge the parabolic