如图,在矩形
中,
,
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/e610aaa2-19da-415a-a314-f58077b576d9.png?resizew=172)
(1)请用无刻度的直尺和圆规作线段AC的垂直平分线,使其分别与
,
,
交于点
(保留作图痕迹,不写作法)
(2)小明想用九年级三角形相似或三角函数的知识求线段
的长,请你帮他完成求解过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/e610aaa2-19da-415a-a314-f58077b576d9.png?resizew=172)
(1)请用无刻度的直尺和圆规作线段AC的垂直平分线,使其分别与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab33dab2417f93f4317c4183c4be4ef.png)
(2)小明想用九年级三角形相似或三角函数的知识求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
更新时间:2024-03-02 08:47:21
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,
是钝角.(保留作图痕迹)
(1)用无刻度的直尺和圆规作
的垂直平分线,分别交
于点
.
(2)连结
,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/f7e71571-e48d-47a6-8a26-8bf732382420.png?resizew=153)
(1)用无刻度的直尺和圆规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54eb01dd383cde273a69b863f96528e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f9b8f9f159077d59974c8a70c28563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐2】如图,在
中,
垂直平分
的周长为
.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/6c562899-97e2-4f3a-824b-5f753d58d12e.png?resizew=106)
(1)
的度数;
(2)
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e1104b08813496c62b69b31c1abca5.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/6c562899-97e2-4f3a-824b-5f753d58d12e.png?resizew=106)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-作图题
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适中
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【推荐3】已知△ABC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/0e3b9e4a-7864-4fe1-b82f-16469ea3e479.png?resizew=181)
(1)如图1,请在直线l上求作点P,使点P满足
最小;
(2)在(1)中用到以下哪些数学知识?______(填上所有正确选项)
A.垂线段最短 B.两点之间线段最短
C.三角形两边之和大于第三边 D.角平分线上的点到角两边的距离相等
E.线段垂直平分线上的点到线段两个端点的距离相等
(3)如图2,过点A求作一直线l,使得l上任取一点E(异于点A),满足
,请用尺规作图,作出直线l;并证明你所作的直线l满足“l上任取一点E(异于点A),均有
”的结论.
(说明:①尺规作图,保留作图痕迹,不写作法;②
表示△ABC的周长,
表示△EBC的周长.)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/0e3b9e4a-7864-4fe1-b82f-16469ea3e479.png?resizew=181)
(1)如图1,请在直线l上求作点P,使点P满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
(2)在(1)中用到以下哪些数学知识?______(填上所有正确选项)
A.垂线段最短 B.两点之间线段最短
C.三角形两边之和大于第三边 D.角平分线上的点到角两边的距离相等
E.线段垂直平分线上的点到线段两个端点的距离相等
(3)如图2,过点A求作一直线l,使得l上任取一点E(异于点A),满足
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5429dfc3840b86ba2322c5751f82bdfa.png)
(说明:①尺规作图,保留作图痕迹,不写作法;②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0663ca0627292380de154d323e18f7c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e9b0c81d022053421c2fcafddb66db.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在□ABCD中,点E,F是直线BD上的两点,DE=BF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/57b24fb9-3208-4df8-877c-76abaf6ad5ed.png?resizew=188)
(1)求证:四边形AFCE是平行四边形;
(2)若BD⊥AD,AB=10,AD=6,四边形AFCE是矩形,求DE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/57b24fb9-3208-4df8-877c-76abaf6ad5ed.png?resizew=188)
(1)求证:四边形AFCE是平行四边形;
(2)若BD⊥AD,AB=10,AD=6,四边形AFCE是矩形,求DE的长.
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解答题-证明题
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适中
(0.65)
【推荐2】如图,已知矩形ABCD.求证:A、B、C、D四点共圆.
![](https://img.xkw.com/dksih/QBM/2019/10/23/2318114086633472/2318193972264960/STEM/6c50e04cdada4715af9bd870e2ad44b1.png?resizew=137)
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解答题-问答题
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适中
(0.65)
【推荐1】【基础巩固】
(1)如图①,在面积为的矩形
中,
平分
交
于点
,若
,求矩形
的周长.
【尝试应用】
(2)在周长为的
中,
平分
交
于点
,
平分
交
于点
,若
,
,求
的面积.
【拓展提高】
(3)如图②,在中,
,
,
,
分别在边
,
,
上,将
沿
翻折后,点
恰好与点
重合,若
,
,求
的值.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图,四边形
、
都是平行四边形,
是边
的中点,联结
并延长,分别交
、
于点
、
.
;
(2)联结
,如果
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beeedb7ddaac2cd3d37151d058ab7fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f2f2a15ad503c09345fbee79839e60.png)
(2)联结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8101e685a5535c3d7acd2f101128bf01.png)
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