如图,已知菱形
的顶点
,
,按以下步骤作图:①分别以点
和点
为圆心,大于
的长为半径画弧,两弧交于点
,
;②作直线
,且
恰好经过点
,与
交于点
.则点
的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9040cff7e9e20dd2817ad9888237d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685d31faa9b3bc099e4c5a11b80088f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586d6b7a54a256cb0ecd0ea2d8262f6d.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2019·河南商丘·一模 查看更多[4]
2019年河南省商丘市柘城县中考模拟数学试题第二章 直角三角形的边角关系 4 解直角三角形鲁教版九年级上册课前预习2024年辽宁省鞍山市台安县部分学校中考模拟(一模)数学试题(已下线)热点09 尺规作图(7大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)
更新时间:2019-10-12 11:29:54
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【推荐1】如图,根据下列尺规作图痕迹,其中表示点O是△ABC外心的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,在
中,按以下步骤作图:①分别以点B,C为圆心,大于
的长为半径画弧,两弧相交于E,F两点,
和
交于点O;②以点A为圆心,
长为半径画弧,交
于点D;③分别以点D,C为圆心,大于
的长为半径画弧,两弧相交于点M,连接
,
和
相交于点N,连接
.若
,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d452f74791f58e8400cb8d2d6038dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f3ddc1c05906d037a3fd793e1c4ab1.png)
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A.2.5 | B.3 | C.3.5 | D.4 |
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【推荐1】如图,点P、Q分别是边长为6cm的等边△ABC边AB、BC上的动点,点P从顶点A,点Q从顶点B同时出发,且它们的速度都为1cm/s,下面四个结论:①BQ=AM;②△ABQ≌△CAP;③∠CMQ的度数不变,始终等于60°;④当第2秒或第4秒时,△PBQ为直角三角形,正确的有( )
![](https://img.xkw.com/dksih/QBM/2018/11/29/2086056897781760/2086721694392320/STEM/72a6ec6dbbb54c06ab27a345176c306d.png?resizew=159)
![](https://img.xkw.com/dksih/QBM/2018/11/29/2086056897781760/2086721694392320/STEM/72a6ec6dbbb54c06ab27a345176c306d.png?resizew=159)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图所示,在等边
中,点
是边
上一点,连接
,将
绕着点
逆时针旋转
,得到
,连接
,则下列结论中:①
;②
;③
;④
,其中正确的结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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【推荐1】如图,在菱形ABCD中,点E,F分别是AB,AC的中点,如果菱形的周长为16,那么EF等于( )
![](https://img.xkw.com/dksih/QBM/2019/6/28/2235426873442304/2238137154011136/STEM/ba8aff9880a7414bb632f370c94610f5.png?resizew=246)
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A.4 | B.8 |
C.12 | D.2 |
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【推荐2】如图,直线
分别与
轴交于点
,点
在线段
上,线段
沿
翻折,点
落在
边上的点
处.以下结论:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
;
直线
的解析式为
;
点
;
若线段
上存在一点
,使得以点
为顶点的四边形为菱形,则点
的坐标是
.正确的结论是( )
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【推荐1】如图,在平面直角坐标系中,抛物线
与x轴交于A、C两点,与y轴交于点B,若P是x轴上一动点,
,连接
,则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/9/3e27f407-72e8-409c-9690-382d58b67905.png?resizew=178)
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【推荐2】关于直角三角形,下列说法正确的是( )
A.所有的直角三角形一定相似 |
B.如果直角三角形的两边长分别是3和4,那么第三边的长一定是5 |
C.如果已知直角三角形两个元素(直角除外),那么这个直角三角形一定可解 |
D.如果已知直角三角形一锐角的三角函数值,那么这个直角三角形的三边之比一定确定 |
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