综合与实践
问题情境:
数学活动课上,王老师出示了一个问题:
如图1,已知线段
,点C在线段
上,
,点P在线段
上,
.求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/61c8d223-4e9f-4f65-b666-81ff35e3d536.png?resizew=234)
(1)请解答王老师提出的问题.
实践探究:
(2)王老师改变条件,并提出新问题,点P在
的延长线上时,原题的其他条件不变,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/9f37ff16-bba5-4064-8655-8d182c79bc6f.png?resizew=234)
知识迁移:
数学活动小组同学把上述线段问题改为角研究之后发现,也能提出类似问题.
该小组提出下面的问题,请你解答.
(3)如图3,已知
,射线
在
的内部,
,射线
在平面内,
.请直接写出
的度数.
问题情境:
数学活动课上,王老师出示了一个问题:
如图1,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f9fc63aeaac7f7e359f1bcd734a90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850842084e25eec602169f1a21240156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/61c8d223-4e9f-4f65-b666-81ff35e3d536.png?resizew=234)
(1)请解答王老师提出的问题.
实践探究:
(2)王老师改变条件,并提出新问题,点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/9f37ff16-bba5-4064-8655-8d182c79bc6f.png?resizew=234)
知识迁移:
数学活动小组同学把上述线段问题改为角研究之后发现,也能提出类似问题.
该小组提出下面的问题,请你解答.
(3)如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.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/ebfcc6ea3a5df3a1c0104f36b3c51455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c49c6b958d8fdf9263673dae3a5271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7c672d36caf72cb2813650ea83f71d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/1/40bab97d-9b00-4df2-8237-5ab806d98cfa.png?resizew=163)
22-23七年级上·辽宁大连·期末 查看更多[6]
辽宁省大连市中山区2022-2023学年七年级上学期期末数学试题(已下线)专题4.24 类比思想探究线段和角的大小(分层练习)(综合练)-2023-2024学年七年级数学上册基础知识专项突破讲与练(北师大版)(已下线)专题4.25 类比思想探究线段和角的大小(分层练习)(综合练)-2023-2024学年七年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题6.28 类比思想探究线段和角的大小(分层练习)(综合练)-2023-2024学年七年级数学上册基础知识专项突破讲与练(苏科版)辽宁省营口市盖州市2023-2024学年七年级上学期期末数学试题(已下线)专题6.29 类比思想探究线段和角的大小(分层练习)(培优练)-2023-2024学年七年级数学上册基础知识专项突破讲与练(苏科版)
更新时间:2022-12-30 10:29:34
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】已知
是关于x的方程
的解.
(1)求 k 的值;
(2)在(1)的条件下,已知线段
,点C是线段
上一点,且
,若点D是
的中点,求线段
的长.
(3)在(2)的条件下,已知点A所表示的数为
,有一动点P从点A开始以2个单位长度每秒的速度沿数轴向左匀速运动,同时另一动点Q从点B开始以4个单位长度每秒的速度沿数轴向左匀速运动,当时间为多少秒时,有
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603258bdfb9f31f2cbfae745e335d901.png)
(1)求 k 的值;
(2)在(1)的条件下,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54700d4ece8fa8e39ea49e658c9b1de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)在(2)的条件下,已知点A所表示的数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ff6486c6b7bdf259addf2c1f34554c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b726a8615ee85a2832d3452cee7d9d5.png)
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适中
(0.65)
名校
【推荐2】已知线段
,延长
到C,使
,D为
的中点,若
cm,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6ce45dbf88852214f59ba3b5ead524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/2a11d870-50d8-41e2-86e8-6056c7a63697.png?resizew=198)
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【推荐3】【新知理解】
点C在线段
上,若
或
,则称点C是线段
的“优点”,线段
,
称作互为“优点”伴侣线段.
例如,图1,线段
的长度为6,点C在
上,
的长度为2,则点C是线段
的其中一个“优点”.
(1)若点C为图1中线段
的“优点”
,则
______;
(2)若点D也是图1中线段
的“优点”(不同于点C),则
______
(填“
”或“
”)
【解决问题】
如图2,数轴上有E,F两点,其中E点表示的数为1,F点表示的数为4;
(3)若M点在N点的左侧,且M,N均为线段
的“优点”,求线段
的长;
(4)若点G在线段
的延长线上,且线段
与
互为“优点”伴侣线段,求点G表示的数.
点C在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7777a27259d26724229b604df42656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3976d08e5f9e24e76ce9579c06a8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/c50a06c0-528b-47b8-9ed3-f06fbea5d60c.png?resizew=260)
例如,图1,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)若点C为图1中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ad0c3d4a5c83a04c5f2590ff954e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
(2)若点D也是图1中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411837b4b3078d05b43cb0439259a362.png)
【解决问题】
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/e8c61e1f-9808-45f3-b5bf-4c1886c22214.png?resizew=422)
如图2,数轴上有E,F两点,其中E点表示的数为1,F点表示的数为4;
(3)若M点在N点的左侧,且M,N均为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(4)若点G在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
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解答题-问答题
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适中
(0.65)
【推荐1】已知,O是直线AB上的一点,
是直角,
平分
.
![](https://img.xkw.com/dksih/QBM/2022/1/16/2895617388249088/2973458721415168/STEM/baa27e1d-914c-477f-a199-6f46ab59094f.png?resizew=573)
(1)如图1,若
,求
的度数;
(2)将图1中的
绕顶点O顺时针旋转至图2的位置,
①探究
(小于平角)和
的度数之间的关系,写出你的结论,并说明理由;
②在
(小于平角)的内部有一条射线
,满足:
,试确定
与
的度数之间的关系,并说明理由.
![](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)
![](https://img.xkw.com/dksih/QBM/2022/1/16/2895617388249088/2973458721415168/STEM/baa27e1d-914c-477f-a199-6f46ab59094f.png?resizew=573)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fbc6ff0ba7479fd95b86a95832424c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(2)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf7a961a55aa7f225fadb6a25a60c75.png)
①探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e42ac04320c64cbf7f35ea8bd3c56e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
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【推荐2】如图,
平分
,
平分
,
.
![](https://img.xkw.com/dksih/QBM/2023/3/8/3190243693453312/3190977741332480/STEM/aca6b17071fc4bf1b090e3161935cac4.png?resizew=154)
(1)求
的度数;
(2)试判断
与
是否互补,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.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/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cb8db26583795e89a30a9753c21ded6.png)
![](https://img.xkw.com/dksih/QBM/2023/3/8/3190243693453312/3190977741332480/STEM/aca6b17071fc4bf1b090e3161935cac4.png?resizew=154)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
(2)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
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