已知在直角坐标平面内,
三个顶点的坐标分别为
,
,
.(网格中每个小正方形的边长是一个单位长度)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/f22c00d5-d4c4-46a7-b292-b663c018df47.png?resizew=239)
(1)以点
为位似中心,在网格内画出
,使
与
位似,且位似比为
;
(2)线段
的长度是__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e5eea5f7f98ca8632358b7e49ceb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c388f2604da379a588f8c5b4a6a767.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/f22c00d5-d4c4-46a7-b292-b663c018df47.png?resizew=239)
(1)以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe103f073845122c66f22dcb14b711f.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
23-24九年级上·湖南·阶段练习 查看更多[2]
更新时间:2023-12-18 16:30:24
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】【问题背景】已知D、E分别是
的
边和
边上的点,且
,则
,把
绕着A逆时针方向旋转,连接
和
.
②若
,
,
,则
___________;
【迁移应用】在
中,
,
,D、E,M分别是
、
、
中点,连接
和
.
①如图3,写出
和
的数量关系 ___________;
绕着点A逆时针方向旋转,当D落在
上时,连接
和
,取
中点N,连接
,若
,求MN的长.
,
,
是直角三角形,
,
,将
绕着点A旋转,连接
,F是
上一点,
,连接
,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67061e6fa526d1e082bed7b01c819982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5277fa450a0c513a86a74420f8ee99f6.png)
【迁移应用】在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
①如图3,写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7ba6e267dde1a65a98f9f36b585ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af06c3e5c23753ec360a7a6163e1809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59276a28786bdce15453a4676c7314d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c50d6d16f99c65005dfb950c30d760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0aa0e6050b4182d68d3155abc5eaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17745e4b357acf175cca995340b065e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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解答题-问答题
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适中
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【推荐2】如图,
为海中的两座小岛,
为海岸上的信号塔.已知小岛A在信号塔C的北偏西
方向80海里处,小岛B在信号塔C的南偏西
方向60海里处.
(2)一艘轮船从小岛A出发,沿直线向小岛B航行.若信号塔的信号有效覆盖半径为50海里,问:轮船在航行过程中,能否收到信号塔C的信号?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c858ffdfa9cf878ee3ccc2bbcfca28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b398c95494eddc79939f16e66cf4da.png)
(2)一艘轮船从小岛A出发,沿直线向小岛B航行.若信号塔的信号有效覆盖半径为50海里,问:轮船在航行过程中,能否收到信号塔C的信号?
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】在图的方格纸中,
的顶点坐标分别为
是
的边
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ed661327-55e9-4225-8401-5284e9e887ea.png?resizew=261)
(1)以原点
为位似中心,在
轴的左侧面画出
的一个位似
,使它与
的相似比为2:1,并分别写出点
的对应点
的坐标;
(2)画出将
向右平移5个单位后的得
,并写出点
的坐标;
(3)判断
与
能否是关于某一点
为位似中心的位似图形,若是,请在图6中标出位似中心
,并写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2430ddb949abfb5e09259c462b8d32eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12abedcafc911bceda90028031a67802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1415e415ec7678b962af22b752faeea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/ed661327-55e9-4225-8401-5284e9e887ea.png?resizew=261)
(1)以原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2430ddb949abfb5e09259c462b8d32eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d801b71db856e5f35bbb8c252c2e2e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2430ddb949abfb5e09259c462b8d32eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4af8bcb24017f7e82caf5a99ad271f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c327753befeb757e064ef5fd7e1d76e.png)
(2)画出将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d801b71db856e5f35bbb8c252c2e2e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0f250dc4cb9897fac763c54bbfa236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbee7197b66320982ae4acaedbb76e5.png)
(3)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2430ddb949abfb5e09259c462b8d32eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0f250dc4cb9897fac763c54bbfa236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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
的正方形网格中,每个小正方形的边长都是1,我们把顶点都在格点上的三角形叫做格点三角形,例如
是一个格点三角形.
![](https://img.xkw.com/dksih/QBM/2020/12/17/2616056835432448/2679773910589440/STEM/29bf4313-2341-42ec-99ca-bb883ed3218a.png)
(1)在图①中,请判断
与
是否相似,并说明理由;
(2)在图②中,以点O为位似中心,再画一个格点三角形,使它与
的位似比为2:1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/12/17/2616056835432448/2679773910589440/STEM/29bf4313-2341-42ec-99ca-bb883ed3218a.png)
(1)在图①中,请判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(2)在图②中,以点O为位似中心,再画一个格点三角形,使它与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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