如图1,已知直线
,点C为直线
,
之间(不在直线上)的一个动点,连接
,
,
平分
,
平分
,
和
交于点F.
,
(2)如图2,连接
,则在点C的运动过程中,当满足
,
时:
①若
,请直接写出
的度数;
②若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfaad5f25944b5422c6c7e12071d6417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b468c0ccddafc04a29802cf242723bde.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a5239269d72d6f9632e7d77347106.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f322756480958d48225932d83622ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bdd99f6772930b8dcdfcf07546efe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
22-23七年级下·广东肇庆·期中 查看更多[7]
广东省肇庆市广宁县2022-2023学年七年级下学期期中数学试题广西壮族自治区河池市东兰县2022-2023学年七年级下学期期中数学试题广西壮族自治区钦州市灵山县那隆中学2022-2023学年七年级下学期期末数学试题(已下线)专题7.36 平面图形的认识(二)中的动点问题(分层练习)(综合练)-2023-2024学年七年级数学下册基础知识专项突破讲与练(苏科版)(已下线)专题2.32 相交线与平行线中的动点问题(分层练习)(综合练)-2023-2024学年七年级数学下册基础知识专项突破讲与练(北师大版)广东省湛江市廉江市良垌镇第三初级中学2023-2024学年七年级下学期月考数学试题(已下线)上海市七下期中真题精选(易错常考60题14个考点分类专练)-2023-2024学年七年级数学下学期期中考点大串讲(沪教版)
更新时间:2023-08-02 10:20:55
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相似题推荐
解答题-作图题
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名校
【推荐1】如图,点D是∠AOB的角平分线OC上的任意一点.
![](https://img.xkw.com/dksih/QBM/2019/9/16/2292095054643200/2292197330026496/STEM/62bddb4077e640d2a055dad28450072f.png?resizew=251)
(1)按下列要求画出图形.
①过点D画DE∥OA,DE与OB交于点E;
②过点D画DF⊥OC,垂足为点D,DF与OB交于点F;
③过点D画DG⊥OA,垂足为点G,量得点D到射线OA的距离等于_____mm(精确到1mm);
(2)在(1)所画出的图形中,若∠AOB=nº,则∠EDF=____________度(用含n的代数式表示).
![](https://img.xkw.com/dksih/QBM/2019/9/16/2292095054643200/2292197330026496/STEM/62bddb4077e640d2a055dad28450072f.png?resizew=251)
(1)按下列要求画出图形.
①过点D画DE∥OA,DE与OB交于点E;
②过点D画DF⊥OC,垂足为点D,DF与OB交于点F;
③过点D画DG⊥OA,垂足为点G,量得点D到射线OA的距离等于_____mm(精确到1mm);
(2)在(1)所画出的图形中,若∠AOB=nº,则∠EDF=____________度(用含n的代数式表示).
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【推荐2】如图,点
,
,
在同一条直线上,
,
,
都是射线,
,
与
互为余角.
与
有何位置关系?请说明理由;
(2)
平分
吗?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4c3c0a34dc21292fa32befd58d8f82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
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解答题-作图题
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【推荐1】已知:直线MN,PQ被射线BA截于A,B两点,且MN∥PQ,点D是直线MN上一定点,C是射线BA上一动点,连结CD,过点C作CE⊥CD交直线PQ于点E.
(1)若点C在线段AB上.
①依题意,补全图形;
②请写出∠ADC和∠CEB的数量关系,并证明.
(2)若点C在线段BA的延长线上,直接写出∠ADC和∠CEB的数量关系,不必证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/0269a790-fe7b-4091-8534-899a9e715acc.png?resizew=564)
(1)若点C在线段AB上.
①依题意,补全图形;
②请写出∠ADC和∠CEB的数量关系,并证明.
(2)若点C在线段BA的延长线上,直接写出∠ADC和∠CEB的数量关系,不必证明.
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解答题-证明题
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【推荐2】如图,已知△ABC是等边三角形,D为AC边上的一点,DG∥AB,延长AB到E,使BE=GD,连接DE交BC于F.
(1)求证:GF=BF;
(2)若△ABC的边长为a,BE的长为b,且a,b满足(a﹣7)2+(b﹣3)2=0,求BF的长.
(1)求证:GF=BF;
(2)若△ABC的边长为a,BE的长为b,且a,b满足(a﹣7)2+(b﹣3)2=0,求BF的长.
![](https://img.xkw.com/dksih/QBM/2019/12/26/2363551771967488/2367636514619392/STEM/dd5fe19047154b949424cdb968ded747.png?resizew=176)
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解答题-证明题
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【推荐1】如图,在
中,
,过点C作
,
,连接
并延长
交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/5f7ee5b8-6003-4582-9730-04e5f6c9a319.png?resizew=182)
(1)求
的度数;
(2)证明:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc67ea4c1008b60d5eeced2dba213fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28971fe3e3f9d3849400e98b46fc3ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df92d8b617945d41c26be0cfb9ec5fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/5f7ee5b8-6003-4582-9730-04e5f6c9a319.png?resizew=182)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119a42b414029f423499017dc5c69240.png)
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解答题-证明题
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【推荐2】如图7,BF∥DG , BC=DC,AB=ED,点A、B、C、D、E在同一直线上.
求证:
(1)C点是FG的中点,
(2)∠A=∠E .
求证:
(1)C点是FG的中点,
(2)∠A=∠E .
![](https://img.xkw.com/dksih/QBM/2017/9/7/1769084118720512/1769507765215232/STEM/776c55f8db4449819c704c7fe8540760.png?resizew=245)
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解答题-问答题
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【推荐1】已知一个角的两边与另一个角的两边分别平行,请结合图形回答下列问题:
(1)如图①,
,
,直接写出
与
的关系__________________;
(2)如图②,
,
,猜想
与
的关系,并说明理由;
(3)由(1)(2),我们可以得出结论:一个角的两边与另一个角的分别平行,那么这两个角__________________;
(4)应用:两个角的两边分别平行,且一个角比另一个角的3倍少
,求出这两个角的度数分别是多少度?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/25/a89ffde5-93c9-480f-8585-a9eb9cf986d1.png?resizew=495)
(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550b15375a54ce849585b60bc42d2dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
(2)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550b15375a54ce849585b60bc42d2dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
(3)由(1)(2),我们可以得出结论:一个角的两边与另一个角的分别平行,那么这两个角__________________;
(4)应用:两个角的两边分别平行,且一个角比另一个角的3倍少
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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【推荐2】如图
是某校操场上的一种漫步机,图
是其侧面结构示意图,已知主支架
长为
,且与水平地面基架
的夹角为
,前支架
与
所成的
,扶手
长为
,
.
(1)求
的度数;
(2)求漫步机的高度(点
到
的距离).
(参考数据:
,
,
,
,
,
,结果精确到
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84755b560534a4cab0c57e1a31cb656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aa0b9869db50a9ab48cc32925d8e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5112c3e82b495e9bd4a55198fd6b48a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9f08a940495ad4be703f72d503103b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/8bf94a53-e0c4-416f-8b61-eaf9f23665ce.jpg?resizew=261)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
(2)求漫步机的高度(点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b318464203fb717e69a8158b241dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e55663fc955479e3599bb6e34f67d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51fcd8fd1a0abae224b1f5ac57fd2942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e21be15a9ca023d3eb8bb345463521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925a4658124762cd8dfa23528f790516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf500933a6540ce69d5e2286690122.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
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【推荐3】综合与实践
【问题情境】
在一次综合与实践课上,老师让同学们以平行线为主题,进行相关问题的探究,进一步感受平行线在寻找角之间的关系的作用,以下是智慧小组的活动过程,请你加入他们小组一起完成探究.
【初步探究】
(1)如图,
,当
,
时,试求∠2的大小;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/f16e091e-d3a8-434e-b612-df2a738cfd19.png?resizew=162)
【深入探究】
(2)经过探究发现,图1中的∠1,∠2,∠3之间存在着一定的数量关系,下列选项中能正确表示这种关系的是 ;
A.
B.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9726bc425d12252b1304f427d7d892d.png)
C.
D.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42528285855b950c9a7c042baa9d9d91.png)
【拓展应用】
(3)如图,一条公路经过三次拐弯后又回到原来的方向,若第一次的拐角
第三次的拐角
,则第二次的拐角
.
【问题情境】
在一次综合与实践课上,老师让同学们以平行线为主题,进行相关问题的探究,进一步感受平行线在寻找角之间的关系的作用,以下是智慧小组的活动过程,请你加入他们小组一起完成探究.
【初步探究】
(1)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d40e403b138555d6a6fe99b26ee7eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee4e0de0c1de0835766b7f627f348c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f410bd82ee39c6f0d632a0dfbab6b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/f16e091e-d3a8-434e-b612-df2a738cfd19.png?resizew=162)
【深入探究】
(2)经过探究发现,图1中的∠1,∠2,∠3之间存在着一定的数量关系,下列选项中能正确表示这种关系的是 ;
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650a1708723472fc63b692a6a877ecc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9726bc425d12252b1304f427d7d892d.png)
C.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e4a62b4df1085b274d7dc301df73d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42528285855b950c9a7c042baa9d9d91.png)
【拓展应用】
(3)如图,一条公路经过三次拐弯后又回到原来的方向,若第一次的拐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fae9fe65242633fd596b89df64903a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d526f4cf54472a3282421fed10483b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/2e17ca10-61b7-410a-be33-3ce113f09d68.png?resizew=184)
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