点
在直线
上,
为射线,
.
的度数;
(2)如图(2),点
在直线
上方,
与
互余,
平分
,求
的度数.
![](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/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a28be55d31356b06b343d28afc42146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
(2)如图(2),点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
20-21七年级下·河北保定·期末 查看更多[9]
河北省保定市定州市2020-2021学年七年级下学期期末数学试题(已下线)沪科版2021-2022学年七年级数学上册第四章 直线与角专题16 角的比较与补(余)角(专题强化-基础)(已下线)专题14 角(重难点突破)-【练好重点题】2021-2022学年七年级数学上学期综合训练卷(人教版)河北省辛集市2021-2022学年七年级上学期期末考试数学试题陕西省宝鸡市凤翔县2021-2022学年七年级下学期期中数学试题(已下线)4.3角(练习)-2022-2023学年七年级数学上册同步精品课堂(人教版)(已下线)专题2.17 相交线与平行线(全章复习与巩固)(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)河北省沧州市2023-2024学年七年级上学期期末数学试题山东省潍坊市峡山双语学校2023-2024学年七年级下学期3月月考数学试题
更新时间:2021-07-23 11:29:00
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解答题-问答题
|
适中
(0.65)
【推荐1】![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ed6294cb-9192-4bb2-9175-9cc0f779d5b7.png?resizew=461)
(1)【问题】如图①,
为平角,
、
分别是
和
的平分线,求
的度数,并写出
的余角.
(2)【拓展】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);
(3)【应用】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.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ed6294cb-9192-4bb2-9175-9cc0f779d5b7.png?resizew=461)
(1)【问题】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)
(2)【拓展】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)
(3)【应用】如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf2957b0a640070e941253e6d6d8be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e702e136211878dce558e0457f15df63.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)
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解答题-作图题
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适中
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【推荐2】如图,点C在射线OA上,CE平分∠ACD. OF平分∠COB并与射线CD交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/33499ceb-3da5-4831-8c7a-870e4738c5d4.png?resizew=130)
(1)依题意补全图形;
(2)若∠COB+∠OCD=180°,求证:∠ACE=∠COF.
请将下面的证明过程补充完整.
证明:∵CE平分∠ACD,OF平分∠COB,
∴∠ACE=______________,∠COF=
∠COB.
(理由: _____________________________________)
∵点C在射线OA上,
∴∠ACD+∠OCD=180°.
∵∠COB+∠OCD=180°,
∴∠ACD=∠____________.
(理由: ___________________________________)
∴∠ACE=∠COF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/33499ceb-3da5-4831-8c7a-870e4738c5d4.png?resizew=130)
(1)依题意补全图形;
(2)若∠COB+∠OCD=180°,求证:∠ACE=∠COF.
请将下面的证明过程补充完整.
证明:∵CE平分∠ACD,OF平分∠COB,
∴∠ACE=______________,∠COF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(理由: _____________________________________)
∵点C在射线OA上,
∴∠ACD+∠OCD=180°.
∵∠COB+∠OCD=180°,
∴∠ACD=∠____________.
(理由: ___________________________________)
∴∠ACE=∠COF.
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知:如图,直线AB、CD相交于点O,OF⊥AB,垂足为点O,且OF平分∠COE,若∠BOC:∠BOD=5:1.
(2)求∠EOF的度数.
(2)求∠EOF的度数.
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解答题-问答题
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适中
(0.65)
【推荐2】已知:直线
,点P是直线BD上不与点B重合的一点,连接AP,
.
(1)如图1,当点P在射线BD上时,若
,
,则
___________.
(2)如图2,当点P在射线BE上时,若
,求
的度数;
(3)若点P是直线BD上不与点B重合的一点,当
,
,
时,请直接用含
的代数式表示
的度数.
![](https://img.xkw.com/dksih/QBM/2020/8/31/2539603701579776/2539749965266945/STEM/7fabfaac09474a74be9f0c4661f8b44c.png?resizew=439)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d6404e43d054e28c3beb54af8e4013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4c226200257201c798a3f25b7ed2ae.png)
(1)如图1,当点P在射线BD上时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b53ecf11cb180d245106ec5a82c60a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89de429062ca02c2beb903386365618b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa9879b33becfb45396c85a84576871.png)
(2)如图2,当点P在射线BE上时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be870d66cefc2350cbf395d7c5453fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
(3)若点P是直线BD上不与点B重合的一点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c499d3ef329f85e59fd72dec6f453bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d690dbdfacf61403843736a0e53e3b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff1b7468f6809ebbb3cbe348d954f06f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5cedbd66abdd49b7b7f3a8e7421f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://img.xkw.com/dksih/QBM/2020/8/31/2539603701579776/2539749965266945/STEM/7fabfaac09474a74be9f0c4661f8b44c.png?resizew=439)
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名校
【推荐1】已知一个角的补角比它的余角的两倍大
,求这个角的度数.
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解答题-问答题
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【推荐2】一个角的补角加上
后,等于这个角的余角的3倍,求这个角以及它的余角和补角的度数.
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