1 . 如图,C为直线
上一点,
平分
,
平分
,
平分
.有下列结论:①
;②
;③
;④
与
互余,其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762ce99ef1a1e063605bb49bc494ef00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96727d4a0f62c82570f4b85f1b65c7bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e9247e099fd0c5c52c678ba163ce54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5300c3055e44cd512a1b2535ee4cbd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fa646a2d9cfca34001748445301c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95160299db05931f0375a08a020b2a42.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2 . 【实践操作】
在数学实践活动课上,同学们准备研究如下问题:如图,点A,O,B在同一条直线上,将一直角三角尺如图①放置,
是直角,直角顶点与点O重合,
平分
.
(1)若
,求
的度数;
(2)猜想图①中
和
的度数之间的关系,写出你的结论,并说明理由.
【变式探究】
将这一直角三角尺如图②放置,其他条件不变,试探究
和
的度数之间的关系,写出你的结论,并说明理由.
在数学实践活动课上,同学们准备研究如下问题:如图,点A,O,B在同一条直线上,将一直角三角尺如图①放置,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83d9fd8f1f593c9ffd819ccf6e59da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
(2)猜想图①中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
【变式探究】
将这一直角三角尺如图②放置,其他条件不变,试探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
您最近一年使用:0次
3 . 如图,点
为直线
上一点,将直角三角板的直角顶点放在点
处,
平分
.
,求
的度数;
(2)根据(
)的结论,试探究
与
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f65eb89c3d782b551a597b88ef291da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
(2)根据(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
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4 . 已知,点O在直线
上,
,
平分
.
【问题初探】
(1)如图1,若
,求
的度数;
【类比分析】
(2)如图1,试探究
与
之间的数量关系,并说明理由;
【拓展应用】
(3)如图2,若
平分
,
平分
,试探究
的值是否为定值?如果是,请求出这个定值;如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49bdf1dcfe6c344dd2442669e72c44b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
【问题初探】
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1ad13c19d6385528847b5ada28bcb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
【类比分析】
(2)如图1,试探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
【拓展应用】
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dab0276d3b5eb8c436883e36581943d.png)
您最近一年使用:0次
5 . 综合与实践:
(1)如图①,
为平角,
,
分别是
和
的平分线,求
的度数,并写出
的余角;
【拓展提升】
(2)如图②,
,射线
是
内部任一射线,射线
,
分别平分
,
,则
的大小为 (用含字母
的代数式表示);
【综合应用】
(3)如图③,
,
,点P是射线
上一动点(与点A不重合),
,
分别平分
,
,分别交射线
于点C,D.求
与
的差.
(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.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/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
【拓展提升】
(2)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec6ce73c6786d50028addff089bbb64.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/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
【综合应用】
(3)如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7dc7451e667ad77a26e75ce11e709e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af13412c83dbbaf7831832e3a10afcef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9cc98e6df306063e645044f0faa7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fed9a763c7c81004fde8f4f9693d2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
您最近一年使用:0次
2024-06-04更新
|
56次组卷
|
2卷引用:山西省朔州市右玉县右玉教育集团2023-2024学年七年级下学期期中数学试题
6 . 如图,
,
、
分别平分
和
,
,
与
互补,则
的度数为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3255ac1b6f934fcb4aa742a81bd8aef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
您最近一年使用:0次
7 . 若一个角的余角为
,那么这个角的度数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7b7bde83b97c3951c4762d537c8db21.png)
您最近一年使用:0次
名校
8 . 如图所示,AB为一条直线,OC是∠AOD的平分线,OE在∠BOD内,∠AOC=30°,∠BOE=2∠DOE,求∠BOE的度数.
您最近一年使用:0次
2024-06-02更新
|
83次组卷
|
9卷引用:山东省淄博市市区(五四制)2020-2021学年六年级下学期期中考试数学试题
山东省淄博市市区(五四制)2020-2021学年六年级下学期期中考试数学试题山东省淄博市临淄区第八中学2022-2023学年七年级下学期期中数学试题山东省东营市广饶县2023-2024学年六年级下学期期中数学试题山东省烟台市芝罘区(五四制)2023-2024学年六年级下学期期中考试数学试题(已下线)4.1 几何初步(题型精讲精练)-【题型分类精粹】2023-2024学年七年级上学期数学期中期末复习讲练系列【考点闯关】(人教版)广东省普宁市2023-2024学年七年级上学期期末数学试题(已下线)寒假作业15 七年级下学期入学考试-【寒假分层作业】2024年七年级数学寒假培优练(人教版)新疆维吾尔自治区省直辖县级行政单位2023-2024学年七年级上学期1月期末数学试题广东省鹤山市2023-2024学年七年级上学期期末数学试题
9 . 如图,直线
相交于点O,
于O,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021bc0ff7e36c9d6d70ddd2e51e8c04c.png)
_________ 度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85814f051a479a1b04a46f70e96557a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09c7dd1600eee571c32611ca39880ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021bc0ff7e36c9d6d70ddd2e51e8c04c.png)
您最近一年使用:0次
10 . 下列结论:①互余且相等的两个角都是
;②同角的余角相等;③若
,则
,
,
互为补角;④钝角没有补角;⑤锐角的补角比其余角大
.其中正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655f864957af2eafb5f9e7cb1930109f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605f2976297a0deaa1602ef09d6a5afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次