2022年多边形及其内角和练习题 .pdf
《2022年多边形及其内角和练习题 .pdf》由会员分享,可在线阅读,更多相关《2022年多边形及其内角和练习题 .pdf(5页珍藏版)》请在得力文库 - 分享文档赚钱的网站上搜索。
1、多边形及其内角和多边形的内角和:n 边形的内角和为(n-2)180 度。(n=3)多边形的外角和:任何多边形的外角和为360。多边形的对角线:从n 边形的某个顶点,可引出(n-3)条对角线。但 n 边形共有 1/2n(n-3)条对角线。一、选择题1.下列命题:多边形的外角和小于内角和三角形的内角和等于外角和多边形的外角和是指这个多边形所有外角之和四边形的内角和等于它的外角和.其中正确的有()(A)0个 (B)1个 (C)2个 (D)3个2.过多边形的一个顶点可以作7 条对角线,则此多边形的内角和是外角和的()(A)4 倍 (B)5倍 (C)6倍 (D)3倍3.一个多边形除1个内角外,其余各内角
2、和为2570,则这个内角的度数为()()50()105()120()1304从 n 边形的一个顶点出发共有对角线()A(n-2)条B(n-3)条C(n-1)条D(n-4)条5下列图形中,是正多边形的是()A三条边都相等的三角形B四个角都是直角的四边形C四边都相等的四边形D六条边都相等的六边形6一个多边形的内角和与外角和之和为2520,这个多边形的边数为()A12 B13 C14 D15 7当多边形的边数增加1 时,它的内角和与外角和()A都不变B内角和增加180,外角和不变C内角和增加180,外角和减少180D都增加 1808(湖南郴州)如图所示,一个直角三角形纸片,剪去直角后,得到一个四边形
3、,则1+2 的度数为()A135B240C270D300二、填空题81一个多边形的每一个外角的度数等于与其邻角的度数的31,则这个多边形是边形.2从 n 边形的一个顶点出发可作_条对角线,从n 边形 n 个顶点出发可作_条对角线,除去重复作的对角线,则n 边形的对角线总数为_条3在有对角线的多边形中,边数最少的是_边形,它共有_条对角线4若一凸多边形的内角和等于它的外角和,则它的边数是_5一个多边形的内角和为5040,则这个多边形是_边形,共有 _条对角线6.用一块等边三角形的硬纸片(如图甲)做一个底面为等边三角形且高相等的无盖的盒子(边缝忽略不计,如图乙),在ABC的每个顶点处各需剪掉一个四
4、边形,其中四边形AMDN中,MDN的度数为 .三、解答题1已知多边形的边数恰好是从这个多边形的一个顶点出发的对角线条数的2 倍,求此多边形的边数2如图所示,根据图中的对话回答问题问题:(1)王强是在求几边形的内角和?(2)少加的那个内角为多少度?3如图,某学校一块草坪的形状是三角形(设其为 ABC)文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 Z
5、Y7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9
6、R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 Z
7、Y7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9
8、R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 Z
9、Y7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9
10、R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2李俊同学从BC 边上的一点D 出发,沿DC CAAB BD
11、的方向走了一圈回到点D处问:李俊从出发到回到原处在途中身体转过的角度是多少?4(创新题)如图,以五边形的每个顶点为圆心,以1 为半径画圆,求圆与五边形重合的面积5.如图,一个六边形的六个内角都是120,1AB,3CDBC,2DE,求该六边形的周长.6.在数学实践课上,小明用橡塑泥做了一个多边形,然后用小刀切去一个角,得到一个新的多边形.(1)如果原多边形是5 边形,那么得到的新多边形的内角和可能是多少?(2)如果得到的新多边形的内角和是1260,那么原多边形的边数是多少?7.用几何画板工具可以很方便地画出正五角星(如图 1 所示).(1)图 1 中EDCBCAD .文档编码:CZ5R9R2R5
12、E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1
13、M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5
14、E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1
15、M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5E4 HS8L1X2O8O7 ZY7X1M8W3D2文档编码:CZ5R9R2R5
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 2022年多边形及其内角和练习题 2022 多边形 及其 内角 练习题
限制150内