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li yong ge dian po xi tu xing
Author(s): 
Pages: 12-14
Year: Issue:  11
Journal: School Journal of Mathematics

Keyword:  直角三角形格点问题正方形网格新题型方格纸钝角三角形图形分割多边形面积全等图形平行线;
Abstract: <正>平常用的方格纸都画着纵横两组平行线,相邻平行线之间的距离总是相等的,这样两组平行线的交点我们称之为“格点”.格点问题是近几年全国各地中考的新题型之一.这类问题答案往往不唯一.具有很强的开放性.一、利用格点绘制三角形例1如图1,正方形网格中的每个小正方形边长都是1.每个小正方形的顶点叫做格点.以格点为顶点分别按下列要求画三角形:(1)使三角形的三边长分别为3、221/2、、51/2;
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