几何概型是数学课程标准的新增内容,是在古典概型基础上的一种延伸,其特点鲜明,题型固定.可分为线性长度、平面区域面积、空间几何体的体积三大类型.我们所研究的所有问题,都可以转化为这三种类型.就象程咬金的三板斧,变来变去就这三招.现对有关题型进行分析. Geometry pattern is a new content of mathematics curriculum standard, which is an extension based on the classical pattern, which has the characteristics of clear and fixed questions, and can be divided into three types: linear length, plane area and volume. All the problems we have studied can be transformed into these three types, just like the three axes that bite the gold and change to the three methods.