如图,在
中,
,
,分别以点A和点C为圆心,大于
的长为半径画弧,两弧相交于点M,N,作直线
,交
于点D,连接
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/197119d9-d3ff-4d36-8d99-f4d5b8288dd8.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0374c406b563f0d258aa5c2654bbd06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a896e05730e8dd3bee64a4911c33dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93148adbc6e856da9a9d263f485d003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/197119d9-d3ff-4d36-8d99-f4d5b8288dd8.png?resizew=176)
A.40° | B.50° | C.60° | D.70° |
22-23八年级下·全国·假期作业 查看更多[2]
更新时间:2022-12-20 17:45:06
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【推荐2】将一副直角三角板按如图放置(其中
),使含
角的三角板
的较长直角边
与等腰直角三角板
的斜边
平行,则图中
的度数为( )
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750503735255040/2750583519158272/STEM/13f5701b4cf54a9ea585389531e473b8.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336eec58e134c64d47f26ec26146c091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750503735255040/2750583519158272/STEM/13f5701b4cf54a9ea585389531e473b8.png?resizew=185)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,AB=AC,∠B=30°,AC的垂直平分线MN交BC于点D,则∠DAC=( )
![](https://img.xkw.com/dksih/QBM/2020/10/28/2580709947965440/2580958523285504/STEM/3d33ef8b8ff0424fa31418df22c588a2.png?resizew=134)
![](https://img.xkw.com/dksih/QBM/2020/10/28/2580709947965440/2580958523285504/STEM/3d33ef8b8ff0424fa31418df22c588a2.png?resizew=134)
A.30° | B.40° | C.60° | D.120° |
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【推荐2】如图,在已知的
中,按以下步骤作图:
①分别以
、
为圆心,以大于
为半径画弧,两弧相交于两点
、
;
②连接
、
交
于点
,连接
;
若
,
,则
的度数为( ).
![](https://img.xkw.com/dksih/QBM/2021/3/3/2669951514451968/2673295434752000/STEM/89f4d0301b314183b7689cfc9ab8e680.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①分别以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45484736347d59e0eeaca5d9365e1586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffc2a946e72f26a8af584d8ead3a396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d545cb81edcdaf8c267bc4b3f19c53ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://img.xkw.com/dksih/QBM/2021/3/3/2669951514451968/2673295434752000/STEM/89f4d0301b314183b7689cfc9ab8e680.png?resizew=173)
A.90° | B.96° | C.108° | D.112° |
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【推荐1】如图,在
中,
,BE是AC边上的中线.按下列步骤作图:①分别以点B,C为圆心,大于线段BC长度一半的长为半径作弧,相交于点M,N;②过点M,N作直线MN,交BC于点D;③连接DE.则线段DE的长为( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/59a93f23-425d-40f9-9941-61c700a82294.png?resizew=258)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/59a93f23-425d-40f9-9941-61c700a82294.png?resizew=258)
A.5 | B.4 | C.3 | D.2 |
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【推荐2】如图,线段
是半圆O的直径。分别以点A和点O为圆心,大于
的长为半径作弧,两弧交于M,N两点,作直线
,交半圆O于点C,交
于点E,连接
,
,若
,则
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf8871339aca054fca24beebc738110.png)
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![](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://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
A.![]() | B.4 | C.6 | D.![]() |
您最近一年使用:0次