如图,在
中,
,点D是
的中点,
交
于点E,连接
,若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/864a27d1-7639-44c9-93ce-7377a8aff3f6.png?resizew=88)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974716ab9388932181e478f2afbc8c98.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/864a27d1-7639-44c9-93ce-7377a8aff3f6.png?resizew=88)
A.![]() | B.3 | C.![]() | D.4 |
更新时间:2022-06-24 16:01:32
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【推荐1】在
中,
,
于
,
平分
交
于
,则下列结论一定成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/2253a3e2-724d-4484-9724-ea0f9bb1d499.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/2253a3e2-724d-4484-9724-ea0f9bb1d499.png?resizew=143)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】
的三边长分别为a,b,c.下列条件:①
;②
;③
;④
,其中能判断
是直角三角形的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a65e5e9d1f10b04e01402186e7f4dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a400863eee78db7b6eba4eb077dc37aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e597138bc1ed3f80e3d4c5cc736584b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcf6cb47d2204c18cdff0c08a3ee7ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,已知点D在AC上,点B在AE上,
,且∠BDA=∠A,若∠A:∠C=4:3.则∠DBC=( )
![](https://img.xkw.com/dksih/QBM/2020/11/4/2585694219976704/2589499402289152/STEM/bf445767-c768-4243-b829-db1dec029316.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b65683ed96a4e6fdabba4ca23062ead6.png)
![](https://img.xkw.com/dksih/QBM/2020/11/4/2585694219976704/2589499402289152/STEM/bf445767-c768-4243-b829-db1dec029316.png?resizew=177)
A.12° | B.24° | C.20° | D.36° |
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【推荐1】如图,在
中,
是
的两条中线,
是线段
上的一个动点,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/d9248fe4-381b-48b2-bac5-42177deb297a.png?resizew=117)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6890c9d6aba861f933297bcc8506013b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df72249193dbca726176b841dc962bb0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/d9248fe4-381b-48b2-bac5-42177deb297a.png?resizew=117)
A.线段![]() | B.线段![]() | C.线段![]() | D.线段![]() |
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【推荐2】如图,将
沿过点
的直线翻折,使直角顶点
落在斜边
上的点
处,折痕为
,连接
,现有以下结论:①
;②
垂直平分
;③
平分
;④若
,则
是等边三角形;其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71730ec20f22e67a207a9d918c70511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d40d5cb59338d3cb1dd504bb12d107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/4/85b43bf7-f8df-4c4f-b780-9072665f33db.jpg?resizew=130)
A.①②③ | B.①②④ | C.①③④ | D.②③④ |
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【推荐1】如图,
是
的直径,
是弦,
,在直径
上截取
,延长
交
于点E.若
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1394fc01d91ffe8e6826cab0c933be3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8192018a58bb1fe23769a48a4d9042ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/5fbf354c-9df4-46bc-8266-4834ae35ba13.png?resizew=126)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,
,
,
在同一直线上,
的平分线与
的平分线交于点
,
,
分别交
于点
,交
于点
,连接
,
.有以下结论:①
;②
是等腰三角形;③
;④
.正确的有( )
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893700218339328/2933773695942656/STEM/4630e55c-7da1-413b-b279-06ca592cbc4b.png?resizew=305)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedf634c305704c1c13cb0353d5dc7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e59617707e98c3441445392333b491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4954382d70368554d8488b491b220b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00334461f72c07c50e1d46679eb98378.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893700218339328/2933773695942656/STEM/4630e55c-7da1-413b-b279-06ca592cbc4b.png?resizew=305)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次