在
中,
,
,
,用无刻度的直尺和圆规在
边上找一点D,使
,下列作法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce0590f4a4b8f0b12d5c3c642595adb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2023-12-01 11:03:51
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【推荐1】如图,在△ABC中,AB=8,BC=10,以B为圆心,任意长为半径画弧分别交BA、BC于点M和N,再分别以M、N为圆心,大于
MN长为半径画弧,两弧交于点P,连结BP并延长交AC于点D,若△BDC的面积为20,则△ABD的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/7/10/2503074454896640/2504183828160512/STEM/338f4873e721425db2ce4aab36046a55.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2020/7/10/2503074454896640/2504183828160512/STEM/338f4873e721425db2ce4aab36046a55.png?resizew=140)
A.20 | B.18 | C.16 | D.12 |
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【推荐2】如图,在
中,
,
,按下列步骤作图:①以点
为圆心,适当长度为半径作圆弧,与
,
延长线分别交于
,
两点;②分别以
,
为圆心,大于
长为半径作圆弧,两条圆弧交于点
;③过点
,
作射线
.则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](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/c94e1ca12da27075e5241b7c7ce74672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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A.60° | B.65° | C.70° | D.75° |
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【推荐1】如图,线段AB、BC的垂直平分线l1,l2交于点O,若∠1=42°,则∠AOC=( )
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849477826625536/2851105318739968/STEM/109253de-58db-44e9-9f64-9f92fa7a408f.png?resizew=174)
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A.90° | B.84° | C.78° | D.42° |
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【推荐2】如图,△ABC中,AB+AC=4,BC的垂直平分线l交AC于D,则△ABD的周长为( )
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A.10 | B.8 | C.6 | D.4 |
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【推荐1】如图,在
中,
,如果要用尺规作图的方法在
上确定一点
,使
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68d1411b29141ea7fc377b44ad92611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea16fdef196f7d3fd65c5e2c509f6c39.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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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B,C为圆心,以大于
的长为半径作弧,两弧相交于两点M,N;②作直线MN交AB于点D,连接CD.若
,
,则
的周长为( )
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A.5 | B.11 | C.12 | D.17 |
您最近一年使用:0次