如图,在
中,
,
,
,用尺规作图,分别以点A和点C为圆心,以
长为半径作弧,两弧相交于点M和N,作直线
交
于点E,交
于点D,连接
,点F是
的中点并连接
,则
的长是 ( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/f07bed1e-c03b-4889-bd69-8d081c7f6834.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07d557c8f66850cc43f785eb0f9aac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/f07bed1e-c03b-4889-bd69-8d081c7f6834.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-03-18 22:30:36
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【推荐1】如图,在等腰△ABC中,AB=AC,∠BAC=56°,∠BAC的平分线与AB的中垂线交于点O,点C沿EF折叠后与点O重合,则∠CEF的度数是( )
![](https://img.xkw.com/dksih/QBM/2021/9/10/2805344152100864/2805830040174592/STEM/1caa623c-a265-4d5f-9226-b6ec8b66e643.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/2021/9/10/2805344152100864/2805830040174592/STEM/1caa623c-a265-4d5f-9226-b6ec8b66e643.png?resizew=222)
A.56° | B.32° | C.50° | D.58° |
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【推荐2】如图所示,线段AC的垂直平分线交线段AB于点D,∠A=40°,则∠BDC=( )
![](https://img.xkw.com/dksih/QBM/2019/6/15/2226004898324480/2228819217006592/STEM/3c48f2f0f3f749949c0eca5a6fbd53b0.png?resizew=74)
![](https://img.xkw.com/dksih/QBM/2019/6/15/2226004898324480/2228819217006592/STEM/3c48f2f0f3f749949c0eca5a6fbd53b0.png?resizew=74)
A.40° | B.80° | C.100° | D.120° |
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【推荐1】如图,在△ABC中,∠B=62°,∠C=24°,分别以点A和点C为圆心,大于
AC的长为半径画弧,两弧相交AC的两侧于点M、N,连接MN,交BC于点D,连接AD,则∠BAD的度数为( )
![](https://img.xkw.com/dksih/QBM/2022/1/12/2893125570519040/2893480860868608/STEM/92b88e42-f067-4837-babb-f3fc4b268c86.png?resizew=171)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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A.70º | B.60º | C.50º | D.40° |
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【推荐2】如图,在矩形
中,
,
,分别以点
和
为圆心,以大于
的长为半径作弧,两弧相交于点
和
,作直线
分别交
,
于点
,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93148adbc6e856da9a9d263f485d003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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【推荐1】如图,在矩形
中,
、
相交于点
,
平分
交
于点
.若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2023/4/17/3218304588996608/3221512800370688/STEM/17f66929714147818b2e19345318a614.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
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【推荐2】如图物体由两个圆锥组成.其主视图中,
,
,若上面圆锥的侧面积为
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【推荐1】如图,若将四根木条钉成的矩形木框变形为平行四边形
的形状,并使得其面积变为原矩形面积的一半,则平行四边形
的内角
的大小为( )
![](https://img.xkw.com/dksih/QBM/2020/7/2/2497411979493376/2498032648118272/STEM/f3a8a998-b7b2-45c8-b90a-b8333d4f0f98.png?resizew=166)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
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A.100° | B.120° | C.135° | D.150° |
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【推荐2】如图,在矩形
中,
,点
在直线
上,若矩形
的周长为
,点
到直线
的距离
的长为6,则点
到直线
的距离
的长为( )
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