1 . 如图,
,
,
,点
在线段
上以
的速度由点A向点
运动,同时,点
在线段
上以
的速度由点
向点
运动,它们运动的时间为
.当
与
全等时,
的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/7603c6b0-b6bb-432c-82cc-7bce9138ca5e.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6b2dcfd1fe3e7de1f11a3f08810337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a014b0039fbe99fa8751a62521c28058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eac4bf88ef98138fca298444568d947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d744165d6aad705f64de41a9d931750a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/7603c6b0-b6bb-432c-82cc-7bce9138ca5e.png?resizew=186)
A.2 | B.1或1.5 | C.2或3 | D.1或2 |
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2 . 如图,
,若不添加辅助线并利用“
”判定
,则可以添加的条件是_____ (填写一个条件即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a290f047f50481318d040c604d72f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2b7d37641a3f3365b33b380a40a96.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/2e821a5e-14b6-4f16-8b4d-c61ac64f3144.png?resizew=120)
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3 . 如图,
,
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad1df79d93a5d9351c9723d687fd94d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b8af8b70345d514893cad291b0da3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0ea5666fbefe9adae7b76579134384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26dba530ba1c15d3d3d5f90e0bf2810.png)
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4 . 已知点C在线段
上,且
和
都是等边三角形,连接
,分别交
于点M,N.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/5e8eb6f4-6ba0-4fbf-8522-f8747e0ca2f0.png?resizew=160)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e8d80f6159c7b21b9238a0696a0da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00e7df43b869a50bd1bc85063763e8a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/5e8eb6f4-6ba0-4fbf-8522-f8747e0ca2f0.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd952c6cc9d03dfe75a363a66e8f61d7.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cbd27d06065f2ddd5cf5ccbe5bef48.png)
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2024-01-24更新
|
75次组卷
|
2卷引用:新疆维吾尔自治区省直辖县级行政单位2023-2024学年八年级上学期1月期末数学试题
名校
5 . 已知:如图,在
中,
,垂足是D,E是线段
上的点,且
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3620030e8808da46df97330103827913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302a8692e9810a569e0ff38a140cead1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/f443fbc1-c278-48f4-91f3-4a539f89c4a7.jpg?resizew=133)
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6 . 已知
和
位置如图所示,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/c31c17df-3bd5-48af-821a-9131039cfcee.jpg?resizew=137)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7ad41b36674fd6e90176ee24cdefbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e499d4d6dd40cc4bda56232628327d40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/c31c17df-3bd5-48af-821a-9131039cfcee.jpg?resizew=137)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b83407b7a590f1529162e79b8073a62.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2765917637583d22a579ff075f9baa3.png)
您最近一年使用:0次
名校
7 . 如图,在四边形
中,
,
,点
是边
上一点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/5203e1c7-b380-4214-9cbf-45d14e395271.png?resizew=180)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
;
(2)试利用这个图形证勾股定理.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd81adb13f5a7550b0f94f770900a613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915e8e775538d41debf1933102c6b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4225465934b192802eb75bb50680724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709636ef573807faf903b99cc7a8bfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20eb8c8cc1c0be36c3fa28a4205f7ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/5203e1c7-b380-4214-9cbf-45d14e395271.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df77247b16614ddcd3355a1c38aee97c.png)
(2)试利用这个图形证勾股定理.
您最近一年使用:0次
8 . 数学兴趣小组在活动时,老师提出了这样一个问题:如图1,在
中,
,
,D是
的中点,求
边上的中线
的取值范围.
【探究】小明在组内经过合作交流,得到了如下的解决方法:延长AD到E,使
,请补充完整证明“
”的推理过程.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01ccfa50b9cfcffc453c323d028571e.png)
证明:延长AD到点E,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
在
和
中
(已作),
(______),
(中点定义),
∴
(______),
(2)探究得出
的取值范围是______;(直接写出结果即可)
【感悟】解题时,条件中若出现“中点”“中线”等字样,可以考虑延长中线构造全等三角形,把分散的已知条件和所求证的结论集合到同一个三角形中.
(3)如图2,
中,
,
,
是
的中线,
,
,且
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
【探究】小明在组内经过合作交流,得到了如下的解决方法:延长AD到E,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01ccfa50b9cfcffc453c323d028571e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01ccfa50b9cfcffc453c323d028571e.png)
证明:延长AD到点E,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59f79992d67ee52d205537728f2745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503668fcc7878c81c664c13fa47cba29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d063939b34bd543fb3d9e296a43e3e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b7513e09cccf40c3a483064b97e48.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01ccfa50b9cfcffc453c323d028571e.png)
(2)探究得出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
【感悟】解题时,条件中若出现“中点”“中线”等字样,可以考虑延长中线构造全等三角形,把分散的已知条件和所求证的结论集合到同一个三角形中.
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531d6f90f144551a35d494b1fe7d2b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaead91b4b6febfcdd6f995d81e550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb64353c99068a7a1a8508a22f5b25b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/e4f76478-10b5-49c3-9318-dbc38a129662.png?resizew=295)
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9 . 如图,
为线段
上一点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/bc4eba65-a91b-448e-80da-3ee7c7618c55.png?resizew=228)
(1)求证:
;
(2)若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd1f3b67f266fc83774bc59ef8b90a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/bc4eba65-a91b-448e-80da-3ee7c7618c55.png?resizew=228)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8094a5e97d6f435a2af8a6f2d2156a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19766bbdc2d23ae20e9f34530c3a1543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853994cf4297b83657d29987632796d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
您最近一年使用:0次
10 . 如图,在
和
中,
,点C在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/c2e84628-02ed-4229-b429-a332a33e70e4.png?resizew=132)
(1)求证:
.
(2)若
,则
______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc12e15044327bb7a478e91a072d7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/c2e84628-02ed-4229-b429-a332a33e70e4.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1d4b1361aa8436571ef0a40d15ceea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5bf6f5d505e85102b0602c6a832907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bcfb91bf2911f80be6a2dcf42ae3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
您最近一年使用:0次