如图,直线AB、CD相交于点O,OE⊥CD,垂足为O,OM平分∠BOE,∠AOC=50°.
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953139894697984/2955364489297920/STEM/f96f1cd9-4994-445d-ba86-91cfa75b8013.png?resizew=222)
(1)求∠DOM的度数;
(2)在∠AOM的内部画射线ON,使得∠MON=45°,那么ON是∠AOD的平分线吗?请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953139894697984/2955364489297920/STEM/f96f1cd9-4994-445d-ba86-91cfa75b8013.png?resizew=222)
(1)求∠DOM的度数;
(2)在∠AOM的内部画射线ON,使得∠MON=45°,那么ON是∠AOD的平分线吗?请说明理由.
21-22七年级上·江苏南京·期末 查看更多[3]
江苏省南京市玄武区四校2021-2022学年七年级上学期期末数学试题(已下线)6.5 垂直-【帮课堂】2022-2023学年七年级数学上册同步精品讲义(苏科版)河北省邢台市威县第三中学2022-2023学年七年级下学期期中数学试题
更新时间:2022-04-10 21:27:21
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,直角三角板
的直角顶点
在直线
上,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/c6946cf4-3792-461d-ad10-0597ece4c46a.png?resizew=202)
(1)比较
和
的大小,并说明理由;
(2)若
平分
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/c6946cf4-3792-461d-ad10-0597ece4c46a.png?resizew=202)
(1)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知直线
,点E和点F分别在直线
和
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/49bd638b-7cbe-4677-a59b-4a8285b9d61b.png?resizew=455)
(1)如图1,射线
平分
交
于点G,若
,求
的度数;
(2)如图2,射线
平分
,点M是射线
上一点(不包括端点F),点N为
的平分线上一点(不包括端点E),连结
,
,延长
交射线
于点H,猜想
与
的关系,并说明理由;
(3)在(1)的条件下,若
绕点G以每秒转动
的速度逆时针旋转一周,同时
绕点F以每秒转动
的速度逆时针旋转,设转动时间为t秒,当
转动结束时
也随即停止转动,在整个转动过程中,当
和
互相平行时,请直接写出此时t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/49bd638b-7cbe-4677-a59b-4a8285b9d61b.png?resizew=455)
(1)如图1,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7652fd5598a9eaa011726784cae56bc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab07e7694d04bc1733c55334ff538f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d6902c8862bd2616be038549f77aff.png)
(2)如图2,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f68e4414c9ab464bf433385c03705f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b59874dae8b394a4e434aa3875708a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4410f982bf334fa726c417ee1d6554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd9360d1288b33a4d556fbb0a0bed57.png)
(3)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc63679c80e6bd24f3a27763d545dcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1653dd6d530c2e15ef1f073760ae5ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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,
,点E是
上一点,连接
.
平分
,过点E作
交
于点M,试说明
;
(2)如图2,若
平分
,
平分
,且
,求
的度数;
(3)如图3,过点E作
交
的平分线于点M,
交
于点N,
,垂足为H.若
,请直接写出
与
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077700c55acc8ded643d5ddbcfd97f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce468f0b9977adf4ed0ab61d9f114431.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d97c5927bb08c0360df82702339669e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
(3)如图3,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077700c55acc8ded643d5ddbcfd97f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90b62aa75a1b3b42af8bb133e043bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55963a9b9b02737110f57a377b41cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dcf697a34ed64aa05f099bb8c64a5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922cba763fb3233f69dca043bff35587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
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,BE、CF是△ABC的高,且BP=AC,CQ=AB,求证:AP⊥AQ.
![](https://img.xkw.com/dksih/QBM/2017/6/28/1718681876496384/1722204538773504/STEM/9b142f5cb0e6440184c31fa1f82fca09.png?resizew=192)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,
,
.
;
(2)若
,试探索:
,
,
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53774b6c1c3d95ca04e3c2dc454ba7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24d579bf81fe156921a6a0ab18b77d37.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0864044fa570bfc9c8aebe0d5d29b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274e29821dd4630a7182573b7c654f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a470bad30b85e31e120e46942cd30e9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】完成下列证明:
如图1,在四边形
中.点E为
延长线上一点,点F为
延长线上一点,交BC于点G,交
于点H,
,求证:
.
证明:
( )
又
(已知).
( ).
( ).
( ).
(已知),
(等量代换).
(同旁内角互补,两直线平行).
( )
如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1393308bc68322f50fa29702dd412263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b333110550208ffce4ec642f78075f.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a569e54557b0a496e527b56a821b9f27.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c08980b6afedc04aa04f385791f0163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8644afba5451902a1d517ec584877a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d47b51eb4549d6d8844642b2934a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c5b6a1d2e583a15ef5ec1d56a60506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d81a3aec3225864d3466451142765d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
您最近一年使用:0次