论文部分内容阅读
我们知道,太阳光线可以看成平行光线,在平行光线的照射下,物体所产生的影子我们称为平行投影.在很多情况下,同学们对物体的影子落在水平面上的问题较为熟知,而对物体的影子不全落在水平面上的情况则感到比较困难.下面就初中数学中常见的几种类型进行剖析.
We know that the sun’s rays can be regarded as parallel rays, and the rays generated by the objects under parallel rays of light are called parallel projections. In many cases, the students are familiar with the problem that the shadow of an object falls on a horizontal plane. The shadow of the object does not fall on the level of the situation is more difficult to find the next few junior high school mathematics in the analysis of several types.