2024九年级下·江苏·专题练习
1 . 如图,
中,
,
是边
上的高.
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/4f79acdf-7619-4fe7-ac0e-1f1086281c03.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34c9cd470bf32922d13d040c427048b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0decd4311730d690c18b2639265c785b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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2024九年级下·江苏·专题练习
2 . 如图,
中
,点D、E分别在
的边
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/d39041ad-6518-4d4c-9bb0-a23d816d2777.png?resizew=127)
(1)求证:
.
(2)如果
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795c8434116bd34166df16949f436480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae1210a744ae636419de68a525faf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b64d9d2b7e21497153310e653f89704.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/d39041ad-6518-4d4c-9bb0-a23d816d2777.png?resizew=127)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317e552047126dddc8c99c526ddc20fa.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c8e51967a9ea55ecbc2a5779bc650c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
2024九年级下·江苏·专题练习
3 . 如图,点O是五边形
和五边形
的位似中心,若
,则五边形和五边形
的面积比是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6723f8b9d907981aa735cd96386bee36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab8ff5783d86b48962786b6c0f280047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc1818e98deb0ed4713e827f1f4ec5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab8ff5783d86b48962786b6c0f280047.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 若
,且面积比为
,则
与
的周长比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61291dca712701e08ff421ef334b371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9c934d84feba963335cc7edf01610e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 已知
的三条边分别为
、
、
,若
的最短边为3,则最长边为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c68128f189c5351f894360ced2124a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
您最近一年使用:0次
2024-03-02更新
|
96次组卷
|
2卷引用:江苏省连云港市东海县2023-2024学年九年级上学期期末数学试题
6 . 已知
,
与
的面积比为
,若
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61291dca712701e08ff421ef334b371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9c934d84feba963335cc7edf01610e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
A.1 | B.2 | C.4 | D.8 |
您最近一年使用:0次
名校
7 . 如图,
,下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/fc04d6af-a055-4d18-a812-f573bd7c9887.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19327e585ab413c61f184731e825c28.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/fc04d6af-a055-4d18-a812-f573bd7c9887.png?resizew=160)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() |
您最近一年使用:0次
8 . 若
,且相似比为
,则
与
的面积比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf1ac64c2d7dc6a94f6c5b66fe67618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 如图,在
中,
,点D在BC上,AD的延长线交
的外接圆于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/8b3257ed-b290-4f7e-828a-01c3830d6f07.png?resizew=146)
(1)求证:
;
(2)若
,
,求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/8b3257ed-b290-4f7e-828a-01c3830d6f07.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1d0258a095e95499a22886f1e23fcb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04725e51b4870658f74de79403e3898f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
您最近一年使用:0次
10 . 如图
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/0068bf44-a9bc-4294-bed2-f5442d619910.png?resizew=158)
(1)
与
是否相似?请说明理由.
(2)设
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2bfd86d94d73197b666477a2f8e48e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decd02bb1fd6ac5a3610a279fe96212b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/0068bf44-a9bc-4294-bed2-f5442d619910.png?resizew=158)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f15ba851a0f65c271ec774095516f07.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
您最近一年使用:0次