将一副直角三角板和一把宽度为
的直尺按如图方式摆放:先把
和
角的顶点及它们的直角边重合,再将此直角边垂直于直尺的上沿,重合的顶点落在直尺下沿上,这两个三角板的斜边分别交直尺上沿于A,B两点,则
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.3 | D.![]() |
更新时间:2024-05-09 11:40:09
|
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【推荐1】已知直角三角形中30°角所对的直角边为3cm,则它的斜边长是( )
A.3cm | B.4cm | C.6cm | D.8cm |
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【推荐2】如图,
中,
,
,
是斜边
的垂直平分线交
边于点
,连接
,则下列各线段之间的数量关系错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/282655aa-693b-4787-b75b-13e30ac922bf.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/282655aa-693b-4787-b75b-13e30ac922bf.png?resizew=158)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,将矩形
折叠,使点
和点
重合,折痕为
,
与
交于点
,若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/faa516d6-b558-4489-a439-d413776d23a2.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7c7c8a54baf6d2327474fdc3840018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/faa516d6-b558-4489-a439-d413776d23a2.png?resizew=194)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】小明将两把完全相同的长方形直尺如图放置在
上,两把直尺的接触点为P,则射线
,即为
的角平分线.边
与其中一把直尺边缘的交点为C,点C、P在这把直尺上的刻度读数分别是2、5,则
的长度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
A.![]() | B.![]() | C.![]() | D.3 |
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【推荐1】如图,正方形木板
的面积是
,在这个木板上截出面积为
的正方形
,连接
,则
的长度为( )
![](https://img.xkw.com/dksih/QBM/2023/7/10/3277832655757312/3279235451543552/STEM/a16d547d87c74f6eb223a199178ce3f2.png?resizew=146)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943bbbc757a39dd74d011c75e66e2725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f0992327528165a6747728712ebbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dc6682d92de85533e57a5071153b21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/2023/7/10/3277832655757312/3279235451543552/STEM/a16d547d87c74f6eb223a199178ce3f2.png?resizew=146)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】三个正方形的面积如图,正方形A的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/fb5cce93-ae0e-4be6-a80e-1851ac3301f5.png?resizew=106)
A.6 | B.4 | C.64 | D.8 |
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