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1教材分析1.1教学内容本节课选自义务教育实验教科书数学鲁教版七年级下册第九章《四边形性质探索》第五节《梯形》,《梯形》一节共分两个课时,本次说课的内容是《梯形》的第一课时,主要内容是梯形的有关概念和等腰梯形的性质探索及应用.1.2地位和作用梯形是在学习完平行四边形的基础上进行研究的最后一种特殊四边形.因为梯形问题需要综合应用三角形和平行四边形的知识来解决,因此,梯形是三角形、平行四边形知识延续与深化.另外,等腰梯形的有关性质,也是今后证明角相等、
1 teaching material analysis 1.1 teaching content This class is selected from the compulsory education experimental textbook mathematics Lujian edition seventh grade ninth chapter “quaternary nature exploration” fifth “trapezoid”, “trapezoid” section is divided into two class hours, the Lesson that the contents of the “trapezoid” the first lesson, the main contents of the concept of trapezoidal and isosceles trapezoidal nature of the exploration and application .1.2 status and role Trapezoid is completed after learning parallelogram based on the last study Special quadrilateral.As the trapezoid problem needs to be solved by the comprehensive application of the knowledge of triangle and parallelogram, trapezoid is the continuation and deepening of the knowledge of triangle and parallelogram.In addition, the related properties of isosceles trapezoid are also proved to be equal in the future,