各市中考数学分类解析专题平面几何基础.pdf

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1、浙江 11 市 2012 年中考数学试题分类解析汇编专题 8：平面几何基础一、选择题1.（2012 浙江湖州3 分）ABC 中的三条中位线围成的三角形周长是15cm，则 ABC 的周长为【】A60cm B45cm C30cm D152cm 2.（2012 浙江嘉兴、舟山4 分）已知 ABC 中，B 是 A 的 2 倍，C 比 A 大 20，则 A 等于【】A 40 B 60 C 80 D903.（2012 浙江丽水、金华3 分）如图，小明在操场上从A 点出发，先沿南偏东30 方向走到 B 点，再沿南偏东60 方向走到C 点这时，ABC 的度数是【】A120B135C150D1604.（2012

2、 浙江台州4 分）如图，点 D、E、F 分别为 ABC 三边的中点，若DEF 的周长为 10，则 ABC 的周长为【】A5 B 10 C 20 D40 5.（2012 浙江义乌3 分）如果三角形的两边长分别为3 和 5，第三边长是偶数，则第三边长可以是【】A2B3C4D8 二、填空题1.（2012 浙江湖州4 分）如图，在 ABC 中，D、E 分别是 AB、AC 上的点，点F 在 BC-第 1 页，共 4 页精品p d f 资料 可编辑资料-的延长线上，DEBC，A=46，1=52，则 2=度2.（2012 浙江嘉兴、舟山5 分）在直角 ABC 中，C=90，AD 平分 BAC 交 BC 于点

3、D，若 CD=4，则点 D 到斜边 AB 的距离为 3.（2012 浙江宁波3 分）如图，AEBD，C 是 BD 上的点，且AB=BC，ACD=110，则 EAB=度4.（2012 浙江义乌 4分）如图，已知 ab，小亮把三角板的直角顶点放在直线b上 若 1=40，则 2 的度数为 5.（2012 浙江义乌4 分）正 n 边形的一个外角的度数为60，则 n 的值为-第 2 页，共 4 页精品p d f 资料 可编辑资料-文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:C

4、F2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG

5、4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9

6、B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码

7、:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1

8、HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 Z

9、O9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档

10、编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2三、解答题1.（2012 浙江杭州8 分）如图，是数轴的一部分，其单位长度为a，已知 ABC 中，AB=3a，BC=4a，AC=5a（1）用直尺和圆规作出ABC（要求：使点A，C 在数轴上，保留作图痕迹，不必写出作法）；（2）记 ABC 的外接圆的面积为S圆，ABC 的面积为S，试说明SS圆2.（2012 浙江绍兴8 分）如图，ABCD，以点 A 为圆心，小于AC 长为半径作圆弧，分别交 AB，AC 于 E，F 两点，再分别以E，F 为

11、圆心，大于12EF 长为半径作圆弧，两条圆弧交于点 P，作射线 AP，交 CD 于点 M。（1）若 ACD=114 ，求 MAB 的度数；（2）若 CNAM，垂足为N，求证：ACN MCN。-第 3 页，共 4 页精品p d f 资料 可编辑资料-文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7

12、D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H

13、1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y1

14、0N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4

15、X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F

16、1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5

17、Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N23.（2012

18、浙江温州8 分）如图，在方格纸中，PQR 的三个顶点及A,B,C,D,E 五个点都在小方格的顶点上，现以A,B,C,D,E 中的三个顶点为顶点画三角形，（1）在图甲中画出一个三角形与PQR 全等；（2）在图乙中画出一个三角形与PQR 面积相等但不全等.-第 4 页，共 4 页精品p d f 资料 可编辑资料-文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1

19、F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X

20、5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF

21、2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4

22、R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B

23、9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:

24、CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2文档编码:CF2P4X7D7K1 HG4R1F1H1O9 ZO9B9X5Y10N2