1 . 已知
,射线
在
的内部,且
.射线
是平面上绕点O旋转的一条动射线,
平分
.
在
的内部.
①
的度数为 °;
②若
与
互余,求
的度数;
(2)若
,求
的度数(用含n的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6dd249c03feba4343809280690343fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a28be55d31356b06b343d28afc42146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf7a961a55aa7f225fadb6a25a60c75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9ec9a0b3a5aba39f61ac1ec5084a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea7b811fa609b8e92da877471564e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9ec9a0b3a5aba39f61ac1ec5084a61.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa8ca1af8ebd3346cf779b85142a966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
您最近一年使用:0次
2024-01-29更新
|
66次组卷
|
6卷引用:江西省鹰潭市余江区2023-2024学年七年级上学期期末数学试题
2 . 如图,直线AB,CD相交于点O,OM⊥AB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/1b6780d7-45d0-4af6-96a3-d1a6c4c40ac0.png?resizew=192)
(1)图中∠1的余角是 ;补角是 ;
(2)若∠1=∠2,判断ON与CD的位置关系,并说明理由;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/1b6780d7-45d0-4af6-96a3-d1a6c4c40ac0.png?resizew=192)
(1)图中∠1的余角是 ;补角是 ;
(2)若∠1=∠2,判断ON与CD的位置关系,并说明理由;
您最近一年使用:0次
2022-09-05更新
|
181次组卷
|
3卷引用:江西省鹰潭市余江区2022-2023学年七年级下学期4月期中数学试题
江西省鹰潭市余江区2022-2023学年七年级下学期4月期中数学试题江西省抚州市实验学校2021-2022学年七年级下学期数学第一阶段综合练习题(已下线)专题2.1两条直线的位置关系-【帮课堂】2022-2023学年七年级数学同步精品讲义(北师大版)
3 . 如图,将一副直角三角尺的直角顶点C叠放在一起
![](https://img.xkw.com/dksih/QBM/2022/1/8/2897062493847552/2933288726691840/STEM/77ed0d2a-6a8f-4dd0-a208-03d98b217a87.png?resizew=255)
(1)当
时,求∠ACB的度数;
(2)当
时,求∠DCE的度数;
(3)猜想∠ACB与∠DCE的数量关系,并说明你的理由.
![](https://img.xkw.com/dksih/QBM/2022/1/8/2897062493847552/2933288726691840/STEM/77ed0d2a-6a8f-4dd0-a208-03d98b217a87.png?resizew=255)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ba3dab77adb5abd0d63f70e4d18d0a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb06fb8ec495ec948ae5fe29f3cf24b7.png)
(3)猜想∠ACB与∠DCE的数量关系,并说明你的理由.
您最近一年使用:0次
2022-03-10更新
|
170次组卷
|
2卷引用:江西省鹰潭市贵溪市2021-2022学年七年级下学期期中数学试题
名校
4 . 如图1,把一副三角板拼在一起,边
,
与直线
重合,其中
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/6/2894953358393344/2897093332295680/STEM/77087ce0-4a7e-417a-8b85-09ddd2abc526.png?resizew=388)
(1)求图1中
的度数;
(2)如图2,三角板COD固定不动,将三角板AOB绕点O顺时针旋转一个角度,在转动过程中,三角板AOB一直在
的内部,设
.
①若OB平分
,求
;
②若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5784ea22dbd90af6cdceae43f80a22e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8052651082b1215593dafbf10e72b837.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2894953358393344/2897093332295680/STEM/77087ce0-4a7e-417a-8b85-09ddd2abc526.png?resizew=388)
(1)求图1中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
(2)如图2,三角板COD固定不动,将三角板AOB绕点O顺时针旋转一个角度,在转动过程中,三角板AOB一直在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15886bb1365d039d8e4450cae287788d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba42ef722511d9cca74c6b7b2f14dd30.png)
①若OB平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15886bb1365d039d8e4450cae287788d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/563eaf4f2841a5bb867ca90523c59449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
2022-01-18更新
|
729次组卷
|
4卷引用:江西省鹰潭市贵溪市2021-2022学年七年级下学期期末数学试题