如图,已知线段AB,依下列步骤用一把三角尺作图,下列叙述不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/16778627-0149-4725-851e-176cd6eeac02.png?resizew=556)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/16778627-0149-4725-851e-176cd6eeac02.png?resizew=556)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2021-09-05 18:09:51
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,△ABC中,DE垂直平分AC交AB于E,∠A=30°,∠ACB=80°,则∠BCE的度数为( )
![](https://img.xkw.com/dksih/QBM/2017/12/1/1829271984406528/1830472622227457/STEM/61a1cf2822614c5eaebd8c6f80e40641.png?resizew=136)
![](https://img.xkw.com/dksih/QBM/2017/12/1/1829271984406528/1830472622227457/STEM/61a1cf2822614c5eaebd8c6f80e40641.png?resizew=136)
A.80° | B.70° | C.60° | D.50° |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,在菱形
中,点
是
边上的一个动点(点P与点
不重合),连接
的垂直平分线交
于点
,交
于点
,在点
由点
向点
的运动过程中,
的大小变化情况是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/5e62611e-692e-47a4-bdb2-0b1495d73cad.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16f89254794ddc0c8490d8010f51f34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/019588539d42267b1e3cff1e475f3e7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/5e62611e-692e-47a4-bdb2-0b1495d73cad.png?resizew=149)
A.变大 | B.先变大后变小 | C.先变小后变大 | D.不变 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】“三等分角”大约是在公元前五世纪由古希腊人提出来的,借助如图所示的“三等分角仪”能三等分任一角.这个三等分角仪由两根有槽的棒OA,OB组成,两根棒在O点相连并可绕O转动、C点固定,OC=CD=DE,点D、E可在槽中滑动.若∠BDE=75°,则∠CDE的度数是( )
![](https://img.xkw.com/dksih/QBM/2020/11/14/2592772051230720/2596934355181568/STEM/84df0df0ec7b4fd8a8c8a1181bcdaa02.png?resizew=294)
![](https://img.xkw.com/dksih/QBM/2020/11/14/2592772051230720/2596934355181568/STEM/84df0df0ec7b4fd8a8c8a1181bcdaa02.png?resizew=294)
A.90° | B.80° | C.70° | D.60° |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
,
的垂直平分线
交
于点
,垂足为点
,连接
,若
平分
,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2019/4/8/2178097069989888/null/STEM/7d66e7b86273466cb6d54a8da97e8f1b.png?resizew=128)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493139a1c94288bd86f90066527b63da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f8559979cc7f7ca5a21e46e4968b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b44fa421d3ab01eee0d360a503bd212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0880fcd038a82649d0e55227c576362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://img.xkw.com/dksih/QBM/2019/4/8/2178097069989888/null/STEM/7d66e7b86273466cb6d54a8da97e8f1b.png?resizew=128)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次