已知,如图,AD与BC交于点O.
(1)如图1,判断
与
的数量关系:_______,并证明你的结论.
(2)如图2,
的度数为______.
(3)如图3,若
平分
,
平分
,
与
交于点M.
,请直接写出
_____.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/9d07819a-7ff7-4168-9c66-e96fd1996c4f.png?resizew=521)
(1)如图1,判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8cae4c78e63ccc3ae5ad336d4b2959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8249167752f66d41862d91bdc2fe532c.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011f170977564d0740b427b2ce3a82fc.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8763f040162f51cb7c4112a9bdd62e0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b69923f7d2733e929c02575e7eed623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060c6a91052f513dacd7c49ff2555255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c884440d4cee3464288b3f5e9ce951.png)
22-23七年级下·河南南阳·期末 查看更多[3]
河南省南阳市西峡县2022-2023学年七年级下学期期末数学试题吉林省长春市朝阳区吉林大学附属中学2022-2023学年七年级下学期期中数学试题(已下线)第03讲 多边形及其内角和-【帮课堂】2023-2024学年八年级数学上册同步学与练(人教版)
更新时间:2023-06-14 16:49:00
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,线段
与线段
平行,P是平面内一点,连接
,射线
分别平分
.
的延长线上时:
①在图1中,依题意补全图形;
②请直接写出直线
与直线
的位置关系:___________;
(2)如图2,当点P在直线
与直线
之间时,射线
,
交于点Q,探究
与
的数量关系,并证明;
(3)若直线
与直线
平行,请直接写出点P的位置:___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fe462dd495948ac5772e5e640607e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344e0b12ec49678ddcc88b4db53cb413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a763f2c2309c4d304aead72dc92ca9ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
①在图1中,依题意补全图形;
②请直接写出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
(2)如图2,当点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b2af99e51b5802da071a079adef40b.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】定理的回顾与应用:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/caba7e0b-98cc-424f-9f21-15d87142ea8f.png?resizew=567)
(1)填空:角平分线的性质定理:角平分线上的点到 .
符号语言:∵如图1,
为
上的平分线,且 ,∴ .
(2)解答:
已知:如图2,
,
为
的平分线,以点
为顶点的
与角的两边相交于点
、
,且
.求证:
.
(3)作图:根据以上种情况,再次寻找其它情况,点
P为
的平分线上的点,请你用尺规作图3,分别在角的两边上找点
、
,使得
(要求保留作图痕迹,不写作法)
(4)思考:如图4,
为
的平分线,以点
为顶点的
与角的两边相交于点
、
,当
与
有怎样的数量关系时,
.(只写数量关系,不必证明)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/caba7e0b-98cc-424f-9f21-15d87142ea8f.png?resizew=567)
(1)填空:角平分线的性质定理:角平分线上的点到 .
符号语言:∵如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
(2)解答:
已知:如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd601617f0ab200d5c80c37ab41d7323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0266e838963295b803051dcf5ff84b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
(3)作图:根据以上种情况,再次寻找其它情况,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
(4)思考:如图4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd601617f0ab200d5c80c37ab41d7323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6497351a04e0398e235f35d76d61c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13534a67c944ca0f3ff715e68955418f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
分别是
,
的平分线,
分别是
,
的平分线.
,
时,
________,
________,
(2)若
,求
,
的度数;
(3)请你猜想,当
的大小变化时,
的值是否变化?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1985812eaff9c01d050022078693fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d9c7b7f3cf7aa36e04042588b537b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cd9d0d73549e2944578f3513631ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9222c2a8519ef3f4e80e8ca3d6a72b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9240b4591fe540de5ac879d2a92f876b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d2dcd886c69e56ae68c62033d1969a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7960538cb70fcf641b94864a90190d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6fede7d2da3ccecf3f9d32a10346c3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67930e8c0c05cc78044e6012bc9cf477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
(3)请你猜想,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b330f393cf095d8bc1e0c933304a4ba.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】(1)如图,在△ABC中,∠B=40°,∠C=80°,AD⊥BC于D,且AE平分∠BAC,求∠EAD的度数.
(2)上题中若∠B=40°,∠C=80°改为∠C>∠B,其他条件不变,请你求出∠EAD与∠B、∠C之间的数列关系?并说明理由.
(2)上题中若∠B=40°,∠C=80°改为∠C>∠B,其他条件不变,请你求出∠EAD与∠B、∠C之间的数列关系?并说明理由.
![](https://img.xkw.com/dksih/QBM/2018/12/8/2092600746729472/2097820681986048/STEM/a109911648cb433ab51d5d05dd143f1c.png?resizew=152)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知
ABC中∠BAC=120°,BC=26,AB、AC的垂直平分线分别交BC于E、F,与AB,AC分别交于点D、G.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/04c12d92-2860-458f-ae3d-6be07756d3a9.png?resizew=204)
(1)直接写出∠B与∠C的角度之和.
(2)求∠EAF的度数.
(3)求
AEF的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/04c12d92-2860-458f-ae3d-6be07756d3a9.png?resizew=204)
(1)直接写出∠B与∠C的角度之和.
(2)求∠EAF的度数.
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,EO⊥CO于点O,∠B=30°,∠E=40°,求∠OAD的度数.
![](https://img.xkw.com/dksih/QBM/2017/11/8/1812817865416704/1813692751331328/STEM/b3118a8cc490463c8d3f5ddb2aeaba13.png?resizew=188)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】一个五角星图案如图.已知五边形
的各个内角都相等,分别求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09a901ad5cc2a28df647c228816a142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7ead0e650ff47273eaa046ebe80b97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/5250b341-4841-47b9-b3d6-daa596b18517.png?resizew=197)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知如图,四边形ABCD中,∠B和∠C的平分线交于点O.
求证:∠BOC=
(∠A+∠D).
求证:∠BOC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2018/8/2/2001944828805120/2002708717985792/STEM/c11ebdfd2870400f8b2dd3b236e7448e.png?resizew=143)
您最近一年使用:0次