已知在Rt
中,
, 则Rt
的外接圆的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c70d27ca6587c5355d5e25bacc5f13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
A.4 | B.2.4 | C.5 | D.2.5 |
22-23九年级上·浙江宁波·期中 查看更多[2]
更新时间:2023-01-07 13:38:48
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【推荐1】如图,在半径为5cm的⊙O中,弦AB=6cm,OC⊥AB于点C,则OC等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/354c0f4b-85be-4465-a800-5f65faac3c12.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/354c0f4b-85be-4465-a800-5f65faac3c12.png?resizew=141)
A.3 cm | B.4cm | C.5cm | D.6cm |
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【推荐2】如图,平行四边形
中,
,
、
分别在
和
的延长线上,
,
,
,则
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab47a785e0687f42e885e11497b7e969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b2f9aa11a47087e5fc483cf712ca9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/18e93ee6-7cff-4130-853b-a949c457de47.png?resizew=155)
A.2 | B.1 | C.3 | D.4 |
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【推荐1】如图,在
中,
,D是
上的点,过点D作
交
于点F,交
的延长线于点E,连接
,
,则下列结论:①
;②
;③
是等边三角形;④若
,则
.其中结论正确的序号为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/100028d3-46fe-4bb8-8870-64a115f21164.png?resizew=129)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e5d35897b172b9b56f16fbfd4b15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e5357c1d8b14eb70ee029d2634db9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5b3967aa677f18e92912d2397f4907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc60f874026061552a62e4a307926b50.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/100028d3-46fe-4bb8-8870-64a115f21164.png?resizew=129)
A.①②③ | B.①②④ | C.③④ | D.①②③④ |
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【推荐2】如图,菱形
的对角线
,
相交于点
,过点
作
交
于点
,连接
,若
,
,则菱形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434845564fd5765244f8d1aa9240fa39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75f601f1a7f1a0be76c37405f2a3fe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() | B.48 | C.72 | D.96 |
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【推荐1】如图,在△ABC中,∠A=60°,BC=5,能够将△ABC完全覆盖的最小圆形纸片的直径是 ( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/b49e3195-7b89-42f2-b77d-6890f44a0479.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/b49e3195-7b89-42f2-b77d-6890f44a0479.png?resizew=155)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
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【推荐2】如图,△ABC中,sinA=
,BC=6,则△ABC外接圆的直径为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/32f703b3-571d-423e-9fa3-cb5c3a7bd8c8.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/32f703b3-571d-423e-9fa3-cb5c3a7bd8c8.png?resizew=157)
A.8 | B.10 | C.4 | D.5 |
您最近一年使用:0次