1 . 如图,已知
,它们的相似比为k,
、
是对应的中线.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf1ac64c2d7dc6a94f6c5b66fe67618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284750727aa2c32b2477d126daefb329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50bc8a1a5c9f3369b92f350b24b36c30.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/db123ff7-22ec-4241-950a-2e03eb8ae7f4.png?resizew=248)
您最近一年使用:0次
2 . 连接三角形两边中点的线段把三角形截成的一个小三角形与原三角形的周长比等于________ .
您最近一年使用:0次
3 . 如图,在平行四边形
中,连接
,点
在
边上,连接
并延长,交
的延长线于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/183459a1-3933-4b4f-bd60-6b521dfb06a3.png?resizew=143)
(1)求证:
;
(2)如果
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83339bbde0baab5e782b449409f12fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/183459a1-3933-4b4f-bd60-6b521dfb06a3.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b677f920f353da4fa7a54e09ffee5b0.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82a54d6dcc11743bbc2a918caedd964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
4 . 如图,在平面直角坐标系中,点
都在反比例函数
的图象上,延长
交
轴于点
,作
轴于点
,连接
、
,并延长
交
轴于点
.若
的面积是4.5,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/a4b53d77-4f19-4197-91a6-1fd58793e1e4.png?resizew=203)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03517310ea1e913f709753592ac65ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a384ae8c7e095d996e83f338abeec21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e2fa4a9aa5a698cd7ab93bf213dadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/a4b53d77-4f19-4197-91a6-1fd58793e1e4.png?resizew=203)
A.2 | B.3 | C.6 | D.9 |
您最近一年使用:0次
2024-01-10更新
|
90次组卷
|
2卷引用:吉林省长春市净月区2023-2024学年九年级上学期数学期末试题
5 . 【教材呈现】下图是华师版九年级上册数学教材第78页的部分内容.
请根据教材提示,写出完整的证明过程.
【结论应用】如图,在
中,
分别是边
的中点,
相交于点
,
交
于点
,则
______.
例2如图,在![]() ![]() ![]() ![]() ![]() ![]() ![]() 证明:连接 ![]() |
【结论应用】如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdba2ac1a72eea482f5578843e00357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4320b5bb88f112357bf2700e1924ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39832b5afaf002272e3dec2eeae39b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089faffc311ecd46ce8d371ea1b002d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/9680c3bc-914d-4b51-afd0-71894d80d021.png?resizew=162)
您最近一年使用:0次
6 . 【教材呈现】如图是华师版九年级上册数学教材第77页的部分内容
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/606f0b20-fd02-4bbc-b4f9-2945c1eb6d97.png?resizew=315)
(1)【定理证明】请根据教材内容,结合图①,写出证明过程.
(2)【定理应用】如图②,已知矩形
中,
,
,点
在
上从
向
移动,
分别是
的中点,则
______.
(3)【拓展提升】在平行四边形
中,
,点
是
的中点,过点
作
平分线的垂线,垂足为点
,连结
,若
,则
______.
猜想:如图,在![]() ![]() ![]() ![]() 根据画出的图形,可以猜想: ![]() ![]() 对此,我们可以用演绎推理给出证明. ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/606f0b20-fd02-4bbc-b4f9-2945c1eb6d97.png?resizew=315)
(1)【定理证明】请根据教材内容,结合图①,写出证明过程.
(2)【定理应用】如图②,已知矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474e10baed482c9054b958e432efcfbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0861e2b4eaa8ca1caf6bbde70cff4c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a71a9d21f77e9535de152bb33f802bb.png)
(3)【拓展提升】在平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4b1fdfa6c28c7b4113ba306547aa4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1496042c1d721cffd25053e997a9a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
您最近一年使用:0次
2024-01-09更新
|
43次组卷
|
2卷引用:吉林省长春市净月区2023-2024学年九年级上学期数学期末试题
7 . 如图,在平行四边形
中,连接
,点
在
边上,连接
并延长,交
的延长线于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/6d36a779-f4e7-4f60-82e1-4064ed0bd8e4.png?resizew=148)
(1)求证:
;
(2)如果
,
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83339bbde0baab5e782b449409f12fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/6d36a779-f4e7-4f60-82e1-4064ed0bd8e4.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b677f920f353da4fa7a54e09ffee5b0.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
8 . 图
、图
、图
均是
的正方形网格,每个小正方形的顶点称为格点,
的顶点均在格点上,点
为
的中点.只用无刻度的直尺,在给定的网格中,按下列要求作图,保留作图痕迹.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/0283afb5-072f-4026-904b-a98071da94d4.png?resizew=503)
(1)在图
中
的边
上确定一点
,连接
,使
.
(2)在图
中
的边
上确定一点
,连接
,使
.
(3)在图
中
的边
上确定一点
,连接
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/0283afb5-072f-4026-904b-a98071da94d4.png?resizew=503)
(1)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
(2)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d5d3ec4b95f26512b9f7af9cdce32b.png)
(3)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7bc92bdf2be511d719f2af2cf2ed5b0.png)
您最近一年使用:0次
9 . 【教材呈现】图1是华师版九年级上册数学教材第78页的部分内容.
例2:如图1,在
中,D、E分别是边
的中点.
相交于点G.求证:
.
证明:连接
.
【结论证明】请根据教材提示,结合图①,写出完整的证明过程.
【结论应用】
(1)如图①,若
,则
_____;
(2)在图①的条件下,过点G的直线分别交
于点M、N.若
,
,四边形
的面积为10,则
_____.
例2:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35bbf1c5259939f288cb0bc65e6ceb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f677175ac1313c715bf876123f7573c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746418f9ba2c37d5de8c398c640d3015.png)
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
【结论证明】请根据教材提示,结合图①,写出完整的证明过程.
【结论应用】
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8230ef72f3e0d33a0f1424adba90ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
(2)在图①的条件下,过点G的直线分别交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae1210a744ae636419de68a525faf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25aa9adbb9fa14e5c484011169e2794d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed23b4dfd4e0c54eb450aceadc9b62da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/abfbb251-6449-4af8-b1a1-ba559befddca.png?resizew=392)
您最近一年使用:0次
10 . 如图,在
的正方形网格中,每个小正方形的边长均为1,
的顶点均在格点上,请按下列要求计算并用无刻度的直尺画出图形.(保留作图痕迹)
中,
______;
(2)如图2,在
边上取一点
,使得
;
(3)如图3,在
边上找一点
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954253b16a82489bb0e152543428c68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbaecd83b7344f11fa39116a440e7165.png)
(2)如图2,在
![](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/84bf36e5cd56e22f5d5458932b126209.png)
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7dd5e0c1bee6a2cfe33f52da1be870.png)
您最近一年使用:0次
2024-01-09更新
|
127次组卷
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6卷引用:吉林省长春市净月区2023-2024学年九年级上学期数学期末试题
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