如图,在矩形
中,
,将矩形
对折,得到折痕
,沿着
折叠,点
的对应点为
,
与
的交点为
;再沿着
折叠,使得
与
重合,折痕为
,此时点
的对应点为
.下列结论:①
是直角三角形;②
;③
;④
;其中正确的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/3ae01f99-1bf8-4079-93a9-e94373b59251.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4df8ba5f00073b773013ea7e3a8f2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ae7d7f5a3bba2a5fe4f84a3b96bde7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b218cb25db22ecb4a7a0e5308cebeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd4603d525c5ace94ac7297b2d20513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f75e6bf81dc5b8e74fa89c60483a1d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/3ae01f99-1bf8-4079-93a9-e94373b59251.png?resizew=195)
A.4个 | B.3个 | C.2个 | D.1个 |
更新时间:2023-11-19 22:42:47
|
相似题推荐
单选题
|
较难
(0.4)
解题方法
【推荐1】如图,正方形
中,点E、F分别在
、
上,
是等边三角形,连接
交
于G,下列结论:①
;②
°,③
垂直平分
,④
,⑤
,其中正确结论有( )个.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/c0abff8c-abca-49a4-82dc-ae7fbae77f87.png?resizew=105)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a087c039047043d2f163fa4f3c0a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24dfa37067ff455888ebe076eeb1fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa14ce1b6476e256e1568d4d25803eb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/c0abff8c-abca-49a4-82dc-ae7fbae77f87.png?resizew=105)
A.5 | B.4 | C.3 | D.2 |
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【推荐2】如图,正方形
的边长为5,
,
,连接
,则线段
的长为( )
![](https://img.xkw.com/dksih/QBM/2020/4/3/2433475192020992/2433695735496704/STEM/e2c3ecd1-c5da-472d-b836-9b046b62ba60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a222362cf8fec36da9af2349993be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1875b1c9e563c45098018f1dd1318461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://img.xkw.com/dksih/QBM/2020/4/3/2433475192020992/2433695735496704/STEM/e2c3ecd1-c5da-472d-b836-9b046b62ba60.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐1】在矩形
中,
,将矩形
沿对角线
折叠,点
的对应点为点
,连接
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582588d8ea55b2d60cac195e26b410c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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|
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名校
解题方法
【推荐2】如图,在黄金矩形ABCD中,四边形ABFG、GHED均为正方形,
,现将矩形ABCD沿AE向上翻折,得四边形AEC'B',连接BB',若AB=2,则线段BB'的长度为( )
![](https://img.xkw.com/dksih/QBM/2020/4/12/2439877861900288/2440465804886016/STEM/cd245a5ae6c5493486a36083c69ca03f.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c1af1e7bb260e9a279c90fe1de77b3.png)
![](https://img.xkw.com/dksih/QBM/2020/4/12/2439877861900288/2440465804886016/STEM/cd245a5ae6c5493486a36083c69ca03f.png?resizew=174)
A.![]() | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
单选题
|
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【推荐1】如图,一张三角形纸片ABC,其中∠BAC=60°,BC=6,点D是BC边上一动点,将BD,CD翻折使得B′,C′分别落在AB,AC边上,(B与B′,C与C′分别对应),点D从点B运动至点C,△B′C′D面积的大小变化情况是( )
![](https://img.xkw.com/dksih/QBM/2018/9/4/2025272504713216/2026384533389312/STEM/b82f7e23536448f488378c7f6f67c9d8.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/2018/9/4/2025272504713216/2026384533389312/STEM/b82f7e23536448f488378c7f6f67c9d8.png?resizew=141)
A.一直减小 | B.一直不变 | C.先减小后增大 | D.先增大后减小 |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图,在矩形
中,
.将
向内翻折,点
落在
上,记为
,折痕为
.若将
沿
向内翻折,点
落在
上,记为
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2020/6/13/2484009222381568/2490625520525312/STEM/b1578d3be76e4c6a8d9de4636d382ab3.png?resizew=151)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eba8ef753df3569875282d12342c149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/6/13/2484009222381568/2490625520525312/STEM/b1578d3be76e4c6a8d9de4636d382ab3.png?resizew=151)
A.![]() | B.1 | C.2 | D.![]() |
您最近一年使用:0次
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解题方法
【推荐1】如图,
的圆心在矩形
的对角线
上,且
与
,
相切,
,
,则
截
的所得的弦
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/2f78ec1e-5197-4761-ad09-de5d6c313881.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/2f78ec1e-5197-4761-ad09-de5d6c313881.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
【推荐2】如图,在矩形纸片
中,
,点E是边
的中点,点M,N分别是边
上一点,将纸片
沿直线
对折,使点A与点E重合,
的对应边
与
交于点G.则下列结论:①
;②
;③
;④
.其中正确结论的个数有( )
![](https://img.xkw.com/dksih/QBM/2023/3/30/3205795270737920/3205984914472960/STEM/a75098dc935e499a88ceadef4fb2bae0.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b124087e8e0f003f15224ecc3c983228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810fee760e06028fb7d37e65db79bfa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776c8632f9b0f3ba37ef51f351bbbe8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9ae70ced4a087cdaa6494e6d2f4038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6efddfb5a99018478a2cd8d7c03d2da.png)
![](https://img.xkw.com/dksih/QBM/2023/3/30/3205795270737920/3205984914472960/STEM/a75098dc935e499a88ceadef4fb2bae0.png?resizew=147)
A.4个 | B.3个 | C.2个 | D.1个 |
您最近一年使用:0次