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《数学课程标准》对梯形知识的要求不多,重点是掌握其性质．同学们在复习时往往忽视这部分内容,但中考对这部分知识的考查却很深入．下面以2005年各地中考试题为例分析梯形知识的应用．一、梯形基础知识的简单应用例1 (恩施市)有一个直角梯形零件ABCD,AD//BC,斜腰DC的长为10 cm, ∠D=120°,则该零件另一腰AB的长是__cm．
There is not much requirement for trapezoidal knowledge in the Mathematics Curriculum Standards. The key is to grasp its nature. Students often overlook this part of the review, but the examination of this part of the knowledge is very thorough. The following is an example of the application of trapezoidal knowledge in 2005 exams around the country. First, the simple application of trapezoidal basic knowledge Example 1 (Enshi City) has a right-angle trapezoidal part ABCD, AD / / BC, the length of the slanting waist DC is 10 cm, ∠ D = 120 °, then the length of the other part of the waist AB Yes __cm.