画角

• 作 者: 黄荣庆
• 出 处: 小学生学习指导
• 发表日期: 2016年Z5期
• 关键词: 画角 刻度线 一所 外点

画角是“角的度量”这一单元中的一个知识点。同学们在学习时,不仅要学会量角的方法,还要学会画角的技巧。怎样画角呢?一、用量角器画角。用量角器画角,一般经过“画、点、标”三个步骤。下面以画一个60°角为例,介绍具体的画法:一画。画一条射线,把量角器放在射线上,使量角器的中心和这条射线的端点重合,0刻度线和这条射线重合,如图一所示;

The painting angle is a knowledge point in the unit of “measure of the angle”. Students learning, not only to learn the method of measuring angle, but also learn the skills of painting angles. How to draw the corner? First, with the protractor angle. With protractor angle, generally after “painting, point, standard ” three steps. The following to draw a 60 ° angle, for example, describes the specific method: a picture. Draw a ray, put the protractor on the ray so that the center of the protractor coincides with the end of this ray, and the 0 scale coincides with this ray, as shown in Figure 1;