初中几何研究的是平面图形的性质,而复杂的千变万化的图形都是由最简单、最基本的图形组合而成的.“能从较复杂的图形中分解出基本的图形,并能分析其中的基本元素及其关系;能描述实物或几何图形的运动和变化;能采用适当的方式描述物体间的位置 Junior geometry studies the nature of planar graphics, and complex, ever-changing shapes are composed of the simplest, most basic graphics. ”" The basic graphics can be broken down from more complex graphics and analyzed The basic elements and their relationships; can describe physical or geometric movements and changes; can use the appropriate way to describe the position between objects