在近几年的中考试题中,出现了一类设计新颖的开放性几何题.它的特点是在原型题的基础上,附加了一些新的要求,或改变某些已知条件,或让图形中的某点、某直线的位置由静变动,要求探索新的结论.这类题型既加强了对学生综合运用知识能力的考查,又提高了对学生探索创新能力的要求, 因而逐渐受到命题者的重视 In the mid-term exam questions in recent years, there has emerged a class of open-minded geometrical problems with novel designs. It is characterized by the addition of some new requirements, or changes in certain known conditions, or graphics, on the basis of prototype questions. The position of a certain point in a certain line and the straight line change from static to new. This type of question has not only strengthened the examination of students’ comprehensive use of knowledge, but also increased the requirement for students to explore innovative abilities, and thus gradually received the proposition. The importance of