1 . 综合与实践
问题提出
(1)如图1,在
中,
,点
分别在
边上,且
,则
与
的大小关系是 .
操作感悟
(2)如图2,将
绕点
顺时针旋转,连接
,猜想
与
的大小关系和位置关系,并证明你的结论.
延伸探究
(3)如图2,若
,在
绕点
顺时针旋转的过程中,求
面积的最大值.
问题提出
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b1c0789fff549e1db4510cc3494fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3648c864f9f58da1dbb166fee84cfeaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
操作感悟
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8518c9bd112f86afb26eec99b01934d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
延伸探究
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b243f607be47bda30d81605f2bafa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
您最近一年使用:0次
2024-06-08更新
|
26次组卷
|
2卷引用:江西省九江市柴桑区九江五校2023-2024学年八年级下学期月考数学试题
2 . 如图1,等腰直角
和等腰直角
的直角顶点C重合,连接
,
.
;
(2)如图2,过A作
,且
(点B,点F在
同侧),连接
,求
的值;
(3)如图3,M是
的中点,
的延长线与
交于点N,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
(2)如图2,过A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6307019d82d2a2a51e0ffd4ebf345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9db02245e7abb624aa7f2d12ea5c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495a0948dd5bd2fe79da704d9e5e869c.png)
(3)如图3,M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d910571a3e7b0ee39fc2e99cc6a80f70.png)
您最近一年使用:0次
2024-05-13更新
|
85次组卷
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2卷引用:安徽省六安市霍邱县2023-2024学年九年级下学期月考数学试题
3 . 阅读下面材料,并完成相应的任务.
任务:
(1)写出材料中的依据:_____.
(2)请根据图3的折法,求证:
是
的中位线.
三角形中位线的折法 如图1,在 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() 第一步,将 ![]() ![]() ![]() ![]() 第二步,将 ![]() ![]() ![]() ![]() 理由如下:设 ![]() ![]() 第一次折叠可得 ![]() ![]() ![]() ∴ ![]() ∵ ![]() ![]() ∵ ![]() ![]() ∴ ![]() ![]() 如图3,继续探究其他折法: 第一步,将 ![]() ![]() ![]() ![]() 第二步,将 ![]() ![]() ![]() ![]() ![]() ![]() |
(1)写出材料中的依据:_____.
(2)请根据图3的折法,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-04-08更新
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114次组卷
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3卷引用:福建省漳州市南靖县第二中学2023-2024学年九年级下学期第二次月考数学试题
4 . 阅读下列材料,并完成相应任务.
镜子里的几何问题
用一面镜子照自己,如果镜子太小,你就看不到自己的整张面孔,换大一点的镜子,你就可以看到整个头部了,如果想看到全身,镜子还得再大一些.那么,到底要多大的镜子才可以呢?可以用数学的思维思考这个问题.如图①,
表示人的高度,
表示镜子里人像的高度,
表示与人相平行的镜面,由平面镜成像原理可知像到镜面的距离等于人到镜面的距离.人与像与镜面都是平行的,E表示人眼睛的位置,易知P是
的中点,Q是
的中点.
是
的中位线,
,要想看到人的全身像,镜子大小最少是人身高的一半.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/1467f3cc-b908-4557-b8b8-ed09d11acd38.png?resizew=445)
(1)材料中P,Q分别为
,
的中点,依据是 .
(2)如图2在(1)的条件下已知小亮身高
米,小亮与镜子
间的距离2米,小明的身高
米,小明与镜子
间的距离为
米,点E为小明眼睛的位置,若小明通过镜子可以看到小亮的全身像,求出此时平面镜的最小高度;
(3)根据镜子中的人像问题请解决如图③,
为直角三角形
,
,点D为
的中点,点P为
上一动点,求
的最小值.
镜子里的几何问题
用一面镜子照自己,如果镜子太小,你就看不到自己的整张面孔,换大一点的镜子,你就可以看到整个头部了,如果想看到全身,镜子还得再大一些.那么,到底要多大的镜子才可以呢?可以用数学的思维思考这个问题.如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eba8ef753df3569875282d12342c149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c073c7d4deabd11bec31c55a75140886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca49c4892a7995633bb46b24470ee40d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/1467f3cc-b908-4557-b8b8-ed09d11acd38.png?resizew=445)
(1)材料中P,Q分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eba8ef753df3569875282d12342c149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
(2)如图2在(1)的条件下已知小亮身高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8603753eedfcedce65a151b46e7ea700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385f8ed2ee50d16bfa7001bc794c65e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f58f972afae04bbc4549a79efa23aa.png)
(3)根据镜子中的人像问题请解决如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c7d01c3618d579121d95d41a63c565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aaf4388136bd791930647db4bbec217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc817fc4cd7ff4920b2144b6ab5be82.png)
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5 . 如图,阳光(平行光线)通过窗户照到厂房内,竖直窗框
在地面上留下2米长的影子
,窗框影子的一端
到窗下墙脚
的距离
为3.6米,窗口底边
与地面的距离
为1.2米.
的长);
(2)如下图,随着平行光线照射角度的变化,窗框影子的一端
沿
向右移动到
,
米,另一端
恰好移动到厂房的另一墙脚
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa69c0b98f245fb9ac28942de982235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a7c635a62b00de7f522a4f9508465c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如下图,随着平行光线照射角度的变化,窗框影子的一端
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37980db411a28c8bf0a3773c8b5d4d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2023-12-22更新
|
129次组卷
|
4卷引用:河北省张家口市张北县第三中学2023-2024学年九年级上学期月考数学试题
6 . 如图,在
中,
,
,
,
是边
的中点,点
位于边
上,连接
并延长交
的延长线于点
,过点
作
,垂足为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/8bae496d-9c54-468e-b70d-ddd400fb5f46.png?resizew=197)
(1)当
时,求
的值;
(2)当
时,求证:
;
(3)作射线
,使其平行于
,且在
的右侧.试问:在射线
上是否存在点
,使得
?如果存在,请求出
的长;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/8bae496d-9c54-468e-b70d-ddd400fb5f46.png?resizew=197)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e2dafd095e5cca4b4e5190552e1b81.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bb8ab7c2b4e68bae55828bcf240d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77fbbc9863a0979b0f6381d01695186.png)
(3)作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.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/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a9fe40f859b37d2bed55c3d312e172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
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名校
7 . 已知:
三个顶点都在
上,
是
的直径.
(1)如图1,求证:
.
(2)如图2,
和
交于点
,过
作
垂足为点
,若
时,求证:
.
(3)如图3,在(2)的条件下,延长
交
于点
,若
,
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/a64b4ad9-0517-47ea-8121-1441addfb052.png?resizew=412)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42927b323c373ced480983db4fce8f01.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9f59fc71dbdb07f7b8eb6341d06c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6034301fc4110da89bdb0f46ad82ab.png)
(3)如图3,在(2)的条件下,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd118a9fd721161376154ac44e37a7da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d00be47dcb89793f14a2fd10f4c522b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
您最近一年使用:0次
2023-10-16更新
|
127次组卷
|
2卷引用:黑龙江省哈尔滨市第十七中学2023-2024学年九年级上学期月考数学试题
8 . 下列说法中,正确的个数是( )
①若
,则
或
;
②相似三角形的中线的比等于相似比;
③如果一条直线截三角形两边的延长线所得的对应线段成比例,那么这条直线平行于三角形的第三边;
④有一边及这边上的高对应成比例的两个三角形面积之比等于这边比的平方;
⑤两条直线被三条直线所截,若截得的线段对应成比例,则这三条直线一定平行;
⑥邻边相等的两个矩形一定相似.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5088fe4cf465e8a696666ca569c24608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9c54e9cc1b4e020e7dc96769e11f9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb307e3dd8cfc8572f2edbe61f382d4.png)
②相似三角形的中线的比等于相似比;
③如果一条直线截三角形两边的延长线所得的对应线段成比例,那么这条直线平行于三角形的第三边;
④有一边及这边上的高对应成比例的两个三角形面积之比等于这边比的平方;
⑤两条直线被三条直线所截,若截得的线段对应成比例,则这三条直线一定平行;
⑥邻边相等的两个矩形一定相似.
A.1个 | B.2个 | C.3个 | D.4个 |
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名校
9 . 小明最近学习了三角形的角平分线相关知识,进一步进行探究之后发现,三角形的一条角平分线分三角形一边的两线段之比值恰好等于三角形的另外两边之比值.
请根据以下思路完成作图和填空:
在
中,
平分
,在
的右侧作
(保留作图痕迹,不写过程);
延长
交
与点E,求证:
.
证明:∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107e5af7174a2f805f87bbfe01b14033.png)
①
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38620ba27282dd12c91dc5969a6d0df.png)
又∵
平分![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
②
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac45f13ca13249e6c6175d19d08bb4a6.png)
③
又∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11070518a54a132e159d3b18628c2c7.png)
④
∴
.
请根据以下思路完成作图和填空:
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107e5af7174a2f805f87bbfe01b14033.png)
延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02bad7fac070822f4c8b4f8b64bda72.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/888e9f2b-f571-493a-afc1-bb91eeb6adef.png?resizew=161)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107e5af7174a2f805f87bbfe01b14033.png)
①
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38620ba27282dd12c91dc5969a6d0df.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
②
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac45f13ca13249e6c6175d19d08bb4a6.png)
③
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11070518a54a132e159d3b18628c2c7.png)
④
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02bad7fac070822f4c8b4f8b64bda72.png)
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10 . 如图,矩形
在平面直的坐标系中,点A在
轴上,
,点
在
轴上,
,点
在
上,
,点
在
轴上,以
为边向下作平行四边形
.
的值;
(2)点
的横坐标是否为定值,请说明理由,并求出点
的横坐标;
(3)若
的面积被x轴分成1∶3两部分,请求出m的值;
(4)若点
关于
的对称点
落在
轴上,请求出点
的坐标.(直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f561a36cc4c9293d8a63ee4e1a7146b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd3fd00798e7ec50afafe7fa7a4f42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13ee3e3b47a736007474860b44b25dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a77b6c44873517ed2fe7188f267bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7bce6eba5d07a34f24c5370c580ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7abedd8d7aa0a7d827fbe577e35feb.png)
(4)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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