当前,多数国家对几何教学的推理论证要求已渐趋下降,尤其是一些偏、怪、难的几何题已普遍受到冷落.与此同时几何教学中的“图形运动”却异军突起,倍受青睐,有的国家或地区甚至还讲授二次变换的“积”.各国几何教学的内容安排各具特色,但有的显得琐碎,未免难成系统(例如美国的有些教材);有的严谨有余、直观不 At present, the theoretical requirements for the theoretical teaching of geometric teaching in most countries have gradually declined, and in particular, some geometric questions that are partial, strange, and difficult have generally been left out. At the same time, the “graphic movement” in geometric teaching has risen suddenly and has become popular. Some countries or regions even teach the “revolution” of the second transformation. The content arrangement of various countries’ geometry teaching has its own characteristics, but some of them seem trivial, and it is difficult to become a system (for example, some teaching materials in the United States); some are more rigorous and intuitive Do not