如图,4幅图中的
,
,则下列叙述错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/5054a63b-e835-4909-903a-29bce78023ed.png?resizew=673)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b173ac8cc4ac4f1c9e1daaa605fbb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da34cf9e12ae21e20af861a581ca0fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/5054a63b-e835-4909-903a-29bce78023ed.png?resizew=673)
A.图丙中的基本作图是过直线外一点作已知直线的垂线 |
B.在图甲、图乙、图丙中,![]() |
C.图甲中所作的三段弧的半径是相同的 |
D.图丁中![]() |
更新时间:2023-04-28 19:42:59
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【推荐1】下列命题正确的是( )
A.一组对边平行,另一组对边相等的四边形是平行四边形 |
B.等腰三角形的高、中线、角平分线,三线合一 |
C.斜边相等的两个直角三角形全等 |
D.到一条线段两个端点距离相等的点,在这条线段的垂直平分线上 |
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【推荐2】如图,在
中,
平分
,按如下步骤作图:第一步,分别以点A、
为圆心, 以大于
的长为半径作弧, 两弧交于点
、
;第二步,过
、
两点作直线,分别交
、
于点
、
;第三步, 连接
、
.若
,
,
,则
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/73121ef3-91ea-4223-bc24-91d51d495658.png?resizew=128)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495be6a6b940e8affe38f2bcdee246b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/73121ef3-91ea-4223-bc24-91d51d495658.png?resizew=128)
A.12 | B.11 | C.13 | D.10 |
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【推荐1】已知点
是直线
外一点,数学兴趣小组的同学用了4种不同的尺规作图方法想过点
作直线
的平行线,根据尺规作图痕迹,直线
不一定与直线
平行的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图所示的作图痕迹作的是( )
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227558671851520/2228522107502592/STEM/11a7848ee99746d888fe9f31869afa82.png?resizew=153)
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227558671851520/2228522107502592/STEM/11a7848ee99746d888fe9f31869afa82.png?resizew=153)
A.线段的垂直平分线 |
B.过一点作已知直线的垂线 |
C.一个角的平分线 |
D.作一个角等于已知角 |
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【推荐1】如图,
中,
,点
为
上的动点(不与
,
重合)过
作
于
,
于
.设
的长度为
,
与
的长度和为
.则能表示
与
之间的函数关系的图象大致是( )
![](https://img.xkw.com/dksih/QBM/2020/7/10/2502721202864128/2503080889262080/STEM/8766b16b-9bd0-4578-bd0e-96a7e8109cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
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![](https://img.xkw.com/dksih/QBM/2020/7/10/2502721202864128/2503080889262080/STEM/8766b16b-9bd0-4578-bd0e-96a7e8109cf5.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,四边形
内接于
,
,
,
,C为
的中点,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
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A.2 | B.![]() | C.![]() | D.4 |
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【推荐1】如图,直角三角形
的一条边为
,另一顶点P在直线l上,下面是三位学生作直角三角形的过程以及自认为正确的最终结论,下列判断正确的是( )
甲:过点A作直线l的垂线,垂足为
;过点B作直线l的垂线,垂足为
,故符合题意的点P有两处;
乙:以
为直径作
,
与直线l交于
,
两点,故符合题意的点P有两处;
丙:过点A作
,与直线l交于点
;过点B作
,与直线l交于点
,故符合题意的点P有两处.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/520393dd-210d-4148-b4f2-46fcdd0bd336.png?resizew=207)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
甲:过点A作直线l的垂线,垂足为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
乙:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
丙:过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aead8de09b92872d3c5cffc2c62f6c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2902d6f6865e7d0022c7457f16f25be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/520393dd-210d-4148-b4f2-46fcdd0bd336.png?resizew=207)
A.甲的作法和结论均正确 | B.甲、乙的作法和结论合在一起才正确 |
C.乙、丙的作法和结论合在一起才正确 | D.乙的作法和结论均不正确 |
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【推荐2】如图,⊙O1与⊙O2相交于A、B两点,经过点A的直线CD分别与⊙O1、⊙O2交于C、D,经过点B的直线EF分别与⊙O1、⊙O2交于E、F,且EF∥O1O2.下列结论:①CE∥DF;②∠D=∠F;③EF=2O1O2.必定成立的有( )
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214960340770816/2216933478006784/STEM/5df43d03ca48474584c87778cd102523.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214960340770816/2216933478006784/STEM/5df43d03ca48474584c87778cd102523.png?resizew=180)
A.0个 | B.1个 | C.2个 | D.3个 |
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