如图,在
中,按以下步骤作图:①分别以B,C为圆心,以大于
的长为半径作弧,两弧相交于M,N两点;②作直线
交
于点D,连接
,若
,
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/e920286f-8752-427c-919e-defde13a6e02.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d452f74791f58e8400cb8d2d6038dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19766bbdc2d23ae20e9f34530c3a1543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/e920286f-8752-427c-919e-defde13a6e02.png?resizew=168)
A.70° | B.73° | C.75° | D.78° |
更新时间:2024-03-04 10:54:27
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【推荐1】如图,
相交于点O,连接
.下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/251482cd-f493-4017-b203-288a99f54677.png?resizew=190)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/251482cd-f493-4017-b203-288a99f54677.png?resizew=190)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,在△ABC中,∠A=60°,BD、CD分别平分∠ABC、∠ACB,M、N、Q分别在射线DB、DC、BC上,BE、CE分别平分∠MBC、∠BCN,BF、CF分别平分∠EBC、∠ECQ,则∠F=( )
![](https://img.xkw.com/dksih/QBM/2019/9/6/2285045787287552/2287926985850880/STEM/a48f8f716a60417baeab7646b71b22a1.png?resizew=145)
![](https://img.xkw.com/dksih/QBM/2019/9/6/2285045787287552/2287926985850880/STEM/a48f8f716a60417baeab7646b71b22a1.png?resizew=145)
A.30° | B.35° | C.15° | D.25° |
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【推荐1】如图,
中,边
的垂直平分线交
于点
,已知
,
,
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698319040512/2585189123440640/STEM/79f7c00b-b9b7-450b-a491-452b5165cb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f186ea827f7becafd1ac4955e22c6812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698319040512/2585189123440640/STEM/79f7c00b-b9b7-450b-a491-452b5165cb7e.png)
A.18 | B.15 | C.10 | D.11 |
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【推荐2】如图,在
中,一位同学按以下步骤作图:(1)以点
为圆心,作与
相交于
两点的弧;(2)分别以点
和点
为圆心,适当长为半径作圆弧,两弧交于点
;(3)作射线
,交
于点
. 则下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/15d1d311-51bc-4f68-8980-e5a2e84817ef.png?resizew=131)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdba36d4c2d4acedbd44d08e4c04127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】如图,已知
,
,
是
边上一点,若用尺规在
边上确定一点
,使得线段
,则下列作图错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
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【推荐2】如图,在
中,
按以下步骤作图:分别以点
和
为圆心,大于
的边长为半径作圆弧,两弧相交于点
和
;作直线
交
于点
,连结
.若
,则
的长可能是( )
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712446361837568/2722180778352640/STEM/8fd4c6ff-f5da-49b9-aa0e-95554d3ae024.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,四边形
为
的内接四边形,
为
的直径,点P在
的延长线上,
与
相切,切点为D,若
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的大小为( )
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【推荐2】如图,已知:直线a、b被
所截,交点分别是点A、B,其中
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( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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