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1、尺规作图活动一、知识回顾、铺垫迁移1、什么是尺规作图？2、我们都学过哪些基本作图？3、用直尺圆规完成以下做图。并说明作图依据。（1）作一条线段等于已知线段（2）作一个角等于已知角（3）作一个角的平分线（4）作已知线段的垂直平分线(5)已知三边，求作三角形cba活动二、画图探究，整体感知已知：AOB及边 OB上一点 C。求作：OCD，使得 OCD=AOB 要求：1、尺规作图保留作图痕迹，不写做法；2、请你写出作图的依据依据：依据：依据：依据：活动三、中考探究，提升认知1、（2018 西城一模）阅读下面材料：在复习课上，围绕一道作图题，老师让同学们尝试应用学过的知识设计多种不同的作图方法，并交流其
2、中蕴含的数学原理已知：直线和直线外的一点P 求作：过点P 且与直线 l 垂直的直线PQ，垂足为点QP某同学的作图步骤如下：文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9
3、ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3
4、K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X
5、1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:
6、CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F
7、9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4
8、HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1步骤作法推断第一步以点 P 为圆心，适当长度为
9、半径作弧，交直线l 于 A，B两点PAPB第二步连接 PA，PB，作APB 的平分线，交直线l 于点 Q APQ_ 直线 PQ 即为所求作PQl请你根据该同学的作图方法完成以下推理:PAPB，APQ_，PQl （依据：_）2、（2017 年 16 题）.下图是“作已知直角三角形的外接圆”的尺规作图过程已知：0,90Rt ABCC，求作Rt ABC的外接圆.作法：如图（1）分别以点A和点B为圆心，大于12AB的长为半径作弧，两弧相交于,P Q两点；（2）作直线PQ，交AB于点O；（3）以O为圆心，OA为半径作O.O即为所求作的圆.请回答：该尺规作图的依据是文档编码:CH4Y2F9B8R4 HC4
10、T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7
11、K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM1
12、0M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K
13、10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档
14、编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4
15、Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8
16、R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1活动四：归纳本质，总结方法活动五：小试牛刀，练习巩固1、过直线外一点作已知直线的平行线2、过直线外一点作已知直线的垂线3.（2016 年 16 题）.下面是“经过已知直线外一点作这条直线的垂线”的尺规作图过程
17、。请回答：该作图的依据是。文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3
18、K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X
19、1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:
20、CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F
21、9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4
22、HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J
23、4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9
24、ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3
25、K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X
26、1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:
27、CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F
28、9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4
29、HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1文档编码:CH4Y2F9B8R4 HC4T2J4T7K9 ZM10M3K3K10X1