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1 说教学内容1.1 教学内容及包含知识点(1)本课内容是初中几何第二册第四章《四边形》第三节《平行四边形及其性质》第一课时.(2)包含知识点:①概念:平行四边形及两条平行线问的距离.②定理:平行四边形性质定理1、定理2、及推论.1.2 本课内容在教材中的地位、作用和前后联系本课内容是本章教材的重点之一.本课以全等三角形的判定及性质作铺垫,研究平行四边形的概念、性质,
1 Teaching content 1.1 Teaching content and including knowledge points (1) The content of this lesson is the first lesson of the fourth chapter of the junior high school geometry, the fourth chapter of the “quadrilateral” “parallelogram and its nature”. (2) Including knowledge points: 1 Concept: The distance between a parallelogram and two parallel lines. 2 Theorem: Properties of parallelograms Theorem 1, Theorem 2, and Corollary. 1.2 The status, role, and context of the content of this lesson in textbooks The content of this lesson is the material of this chapter. One of the key points. This lesson lays the groundwork for the judgment and nature of the equal triangle, and studies the concept and nature of the parallelogram.