如图,在
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/49fdad09-3696-4746-8e7a-1008f3ecc6fe.png?resizew=160)
(1)利用尺规作线段AC的垂直平分线DE,垂足为E,交AB于点D,(保留作图痕迹,不写作法)
(2)若
的周长为a,先化简
,再求T的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8e1533cf896dc51edc46b182457db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cf7f3b042a5b588d3644099c2e2aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9da5405550171e8cede17cba1c4a02a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/49fdad09-3696-4746-8e7a-1008f3ecc6fe.png?resizew=160)
(1)利用尺规作线段AC的垂直平分线DE,垂足为E,交AB于点D,(保留作图痕迹,不写作法)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec8f076622b28e106ebb2fe1b099641.png)
2023·广东佛山·一模 查看更多[1]
(已下线)2023年广东省佛山市南海市里石门中学九年级数学中考复习第一次模拟测试题
更新时间:2023-02-22 10:15:32
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相似题推荐
解答题-证明题
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【推荐1】如图,在□ABCD中,EF是对角线AC的垂直平分线,分别与AD,BC交于点E,F.
![](https://img.xkw.com/dksih/QBM/2021/8/8/2781529950642176/2781969188970496/STEM/8d57cebd-f914-45f7-9947-9c1d13a76cdb.png)
(1)求证:四边形AECF是菱形;
(2)若AC=6,AE=5,求菱形AECF的面积.
![](https://img.xkw.com/dksih/QBM/2021/8/8/2781529950642176/2781969188970496/STEM/8d57cebd-f914-45f7-9947-9c1d13a76cdb.png)
(1)求证:四边形AECF是菱形;
(2)若AC=6,AE=5,求菱形AECF的面积.
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【推荐2】(1)阅读理解:我们知道,只用直尺和圆规不能解决的三个经典的希腊问题之一是三等分任意角,但是这个任务可以借助如图所示的一边上有刻度的勾尺完成,勾尺的直角顶点为
,“宽臂”的宽度
,(这个条件很重要哦!)勾尺的一边
满足
,
,
三点在同一直线上且
.
如图所示,下面以三等分
为例说明利用勾尺三等分锐角的过程:
第一步:画直线
使
,且这两条平行线之间的距离等于
(说明:两条平行线中的一条直线上任意一点,到另一条直线的距离,就是这两条平行线之间的距离);
第二步:移动勾尺到合适位置,使其顶点
落在
上,使勾尺的
边经过点
,同时让点
落在
的
边上;
第三步:标记此时点
和点
所在位置,作射线
和射线
.
请完成第三步操作,图中
的三等分线是射线________、________.
![](https://img.xkw.com/dksih/QBM/2022/4/14/2963844604592128/2987039337103360/STEM/e97ae5f0-6c88-4fc2-85b9-be463938e598.png?resizew=191)
(2)在(1)的图中,过点
作
于点
,根据(1)中第一步的操作可知
,请你证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adffbe33b4fd4af7948219320365544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1996b6f0d3bf2fdadc15f9611e8db6.png)
如图所示,下面以三等分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
第一步:画直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
第二步:移动勾尺到合适位置,使其顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
第三步:标记此时点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
请完成第三步操作,图中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2963844604592128/2987039337103360/STEM/e97ae5f0-6c88-4fc2-85b9-be463938e598.png?resizew=191)
(2)在(1)的图中,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f89e4cf581b24cfbb93ff2dbf3461d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61be5aa0d85cb45e03e7634746b182bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adf4038599a179dc0b12a61d947d11d.png)
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解答题-作图题
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【推荐1】如图,已知
,请用尺规过点
作一条直线,使其将
分成面积比为
两部分.(保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d97ca5641e1be5eacbd1d0c210f42f.png)
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解答题-作图题
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【推荐2】如图,
的斜边AB=7,
,
(1)用尺规作图作线段AC的垂直平分线DE,与AB、AC分别相交于D、E两点(保留作图痕迹,不要求写作法、证明);
(2)求DE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8008eab22184d57ef7d4258f2188f5c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9760c9b67d03d0e2448ec7d36c712495.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/a5ddf4ef-92f4-457a-afbe-5fe92e5fcf5d.png?resizew=112)
(1)用尺规作图作线段AC的垂直平分线DE,与AB、AC分别相交于D、E两点(保留作图痕迹,不要求写作法、证明);
(2)求DE的长.
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解答题-作图题
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【推荐1】在学习了第18章特殊平行四边形之后,老师给班级同学出了一道思考题.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/127f39b2-8ffa-462f-8aed-11b33a7fc687.png?resizew=184)
小明经过思考后,给出了自己的作法:
①连接
,
,相交于点
;
②连接
并延长交
的延长线于点
;
③连接
,四边形
即为所求作的菱形.
根据小明的设计,完成下面问题:
(1)补全图形;
(2)证明四边形
为菱形;
(3)若
,
,求
的长.
如图,已知![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/127f39b2-8ffa-462f-8aed-11b33a7fc687.png?resizew=184)
小明经过思考后,给出了自己的作法:
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99021bdf53077447f69f4a9aaa3ba5e.png)
根据小明的设计,完成下面问题:
(1)补全图形;
(2)证明四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99021bdf53077447f69f4a9aaa3ba5e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cfa5651c2e3ddc9a59ef514714039c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
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【推荐2】如图,在直角三角形ABC中,∠C=90°,∠B=60°,AB=8cm,E、F分别为边AC、AB的中点.
(1)求∠A的度数;
(2)求EF和AE的长.
(1)求∠A的度数;
(2)求EF和AE的长.
![](https://img.xkw.com/dksih/QBM/2019/8/1/2259520954163200/2262182403104768/STEM/45b821388045438a93a6ce647fffaba5.png?resizew=159)
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【推荐1】已知:如图,四边形ABCD中,AD∥BC,∠A=90°,BC=2,∠ABD=15°,∠C=60°.
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903327973187584/2904465127866368/STEM/f4943127e95b489abf1b37363197f289.png?resizew=116)
(1)求∠BDC的度数;
(2)求CD的长.
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903327973187584/2904465127866368/STEM/f4943127e95b489abf1b37363197f289.png?resizew=116)
(1)求∠BDC的度数;
(2)求CD的长.
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【推荐2】已知
与
成正比例,当
时,
的值为
.
(1)求
与
之间的函数表达式;
(2)求该函数图象与坐标轴围成的三角形周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3715267f45e5babbcdf714b4727c467e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d49d943993210b236a921986cfc8377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求该函数图象与坐标轴围成的三角形周长.
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