翻阅2010年全国各地的高考数学试题,不难发现有一个新的亮点———立体几何创新题甚多.它们短小精悍,新颖别致,设计独特,能力立意高.现归纳整理如下,以供教学参考.1侧重考查数学直觉思维能力例1(四川卷理11)半径为R的球O的直径AB垂直于平面α,垂足为B,△BCD是平面α内边长为R的 Read through 2010 across the country entrance math test, is not difficult to find a new bright spot --- a lot of three-dimensional geometric innovation, they are short and pithy, novel and unique, unique design, ability to conception high now summarized as follows for reference for teaching .1 emphasis on examining the ability of mathematical intuition thinking Example 1 (Sichuan Volume 11) diameter of the ball R with radius O perpendicular to the plane α, the foot is B, △ BCD is the plane α inner edge length R