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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、22~(1/2)、、5~(1/2);
The commonly used squared papers are drawn with two sets of parallel lines. The distance between adjacent parallel lines is always the same, so that the intersection of the two sets of parallel lines is called “grid.” The grid problem is near One of the new questions in the national examinations throughout the country. The answer to this type of question is often not unique. It has a strong openness. First, use the grid to draw triangles. Example 1 As shown in Figure 1, the length of each small square in the square grid All are 1. The vertices of each small square are called grid points. Draw triangles with grid points as the vertices according to the following requirements: (1) Make the lengths of the three sides of the triangle 3, 22~(1/2), and 5~, respectively. (1/2);