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几何是研究图形的形状、大小和位置的数学分支.在更深入地学习几何之前,对几何图形从总体上先有初步认识很有必要.下面对教科书的相关内容进行概括和补充.一、几何图形在观察各种物体时,除了材质、温度和硬度等物理性质,我们还会注意到它们的形状、大小和位置等几何性质.把实际物体的物理性质等舍弃,保留其几何性质,就产生了几何图形.例如,足球场、篮球场、排球场等都可以视为长方形,足球、篮球、排球等都可以视为球.包括长方形、球等的各种几何图形,都是从实际物体中抽象出的空间形式的代表.
Geometry is a mathematical branch to study the shape, size and position of a figure.It is necessary to get a general understanding of geometrical shapes before learning geometry in more depth.Considering and summarizing the related contents of textbooks, Geometry In observing a variety of objects, in addition to the physical properties such as material, temperature and hardness, we also noticed geometric properties such as their shape, size and position, etc. The physical properties of real objects are discarded and their geometric properties are preserved. For example, soccer field, basketball court, volleyball court, etc. can be regarded as rectangular, football, basketball, volleyball, etc. can be regarded as a ball. Including rectangles, balls and other geometric figures are from the actual object In the abstract space form of representation.