中考数学复习-第5单元-三角形-第19课时-几何初步及相交线、平行线教案1VIP免费

ideological and theoretical qualities and practical working ability, and strive to build a contingent of league cadres with positive work style and high quality. Hold a regular meting of the party secretary every fortnightly, arrange the work of the regiment, fedback the student information. Focus on training junior high school, junior high school secretary of the regiment branch to enable them to raise A firm political conviction, diligent and diligent learning spirit and practical and innovative work style.第五单元 三角形第 19 课时 几何初步及相交线、平行线教学目标【考试目标】（1）会比较线段的大小，理解线段的和、差，以及线段中点的意义.理解两点间距离的意义，会度量两点之间的距离； （2）理解角的概念，能比较角的大小，能估量一个角的大小，会计算角度的和与差，认识度、分、秒，会进行角度的简单换算； （3）理解角平分线及其性质； （4）理解补角、余角、对顶角等概念及有关性质； （5）理解垂线、垂线段等概念及有关性质；（6）知道过一点有且仅有一条直线垂直于已知直线，会用三角尺或量角器过一点画一条直线的垂线； （7）理解线段垂直平分线及其性质； （8）掌握两直线平行的判定定理和有关性质； （9）知道过直线外一点有且仅有一条直线平行于已知直线，会用三角尺和直尺过已知直线外一点画这条直线的平行线； （10）理解点到直线距离的意义、两条平行线之间距离的意义，会度量点到直线的距离，两条平行线之间的距离.【教学重点】1.掌握线段、射线、直线的相关概念；2.掌握角的基本概念及应用；3.掌握平行的性质及判定；4.掌握垂直的性质及判定.教学过程一、体系图引入，引发思考 Strengthen the team connection, strengthen the knowledge education among the students (especially the first grade students), and promote the formation of good school spirit with the influence of the league members. All League branches should start with recommending outstanding students as the development objects of the League, take amateur league schools as the basis, conscientiously do a good job in the...