如图,正方形
中,E为对角线
上一点,过点E作
于点F,
于点G,连接
,
,下列结论:①
;②
;③
;其中正确的个数为( )
![](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/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c369f94a6056d114f95432968a7e666f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64ba097b4984ec637ee9c1b4fc18791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34da0bafac21a66f7e5d3e42aba8e32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/dfbb6537-fb02-4b63-8b2f-8b994b714d51.png?resizew=115)
A.0个 | B.1个 | C.2个 | D.3个 |
更新时间:2023-08-04 21:15:54
|
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【推荐1】如图,等边三角形ABC中,D、E分别在AB、BC边上,且
,AE与CD交于点F,
于点G,下列结论:①
:②
;③
是等腰三形;④
,其中正确的结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/70910dc8-8c30-41b9-9698-85db1f09d6f7.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c39d2c88a214e6daeb62ddba4686b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51783c0aceeee6e0c68d377b0333db78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af09b90a3a185de7685b454889e84bcd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/70910dc8-8c30-41b9-9698-85db1f09d6f7.png?resizew=150)
A.①② | B.①②③ | C.①②④ | D.③④ |
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【推荐2】如图,已知
是边长为
的等边三角形,点
是边
上的一点,且
,以
为边作等边
,过点
作
,交
于点
,连接
,则下列结论:
;
四边形
是平行四边形;
其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8cfcff64853abf56e6a02e2e2157ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8efedc04a94d4d5e10115069c9f3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085e7b6e10f724918b2c43f6fc249825.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐1】如图,在
中,
,
,
为线段
上一动点(不与点
、点
重合),连接
,作
,
交线段
于点
.以下四个结论:①
;②当
为
中点时,
;③当
时,
;④当
为等腰三角形时,
.其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/69e6c1f1-2c48-4d95-ac64-808e69691651.png?resizew=216)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9608cad892644b4094ed6438b69572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/bebd95e4e02ded19f5c0a8de71c27ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4dbea6a5faecdd8f6c06cf9fd43a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/755b680b34589e9caa1920bf5a8d3258.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/69e6c1f1-2c48-4d95-ac64-808e69691651.png?resizew=216)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】如图,在
中,
,以点
为圆心,以
为半径作弧交
于点
,再分别以
为圆心,以大于
长为半径作弧,两弧相交于点
,作射线
交
于点
,连接
.以下结论不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf0538ba72de3f9cd7e3c01933a389f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b840be5852709e18ea985954545e78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】一座拦河大坝的横截面是梯形ABCD,AD∥BC,∠B=90°,AD=6米,坡面CD的坡度i=1:
,且BC=CD,那么拦河大坝的高是( )米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
A.18 | B.24 | C.20 | D.12 |
您最近一年使用:0次
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【推荐2】如图,正方形
的边长为
,
是对角线
上一动点(点
与端点
不重合 ),
于点
,
于点
,连接
,则
长的最小值为( )
![](https://img.xkw.com/dksih/QBM/2021/7/27/2773095982604288/2778243279167488/STEM/e79e7aef-fe46-4e49-b59f-349f59414bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a55bd904c2fa753ec71bbb798e6f5cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519b6448f75245d8f388233ebcdb6075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/2021/7/27/2773095982604288/2778243279167488/STEM/e79e7aef-fe46-4e49-b59f-349f59414bb0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在正方形
中,
是等边三角形,
的延长线分别交
于点E、F,连接
,
与
相交于点H,给出下列结论:①
;②
;③
;④
.其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/e03e6a65-9ea4-49ee-85dc-3b5b49b47cbc.png?resizew=133)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79f6bec0d2dab9b9efedfe86d1159b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b624977a4bef8e7ae356c166157d8afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfec67e0a34f68879ddea6e7383d1dbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca1b941857c914939d1ae4db015448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9018f35a0f423274ddb89595aa317c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f027970eecb3086c5d70caff04f858a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/e03e6a65-9ea4-49ee-85dc-3b5b49b47cbc.png?resizew=133)
A.①②③ | B.①②④ | C.②③④ | D.①③④ |
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【推荐2】如图,△ABC是直角三角形,S1,S2,S3为正方形,已知a,b,c分别为S1,S2,S3的边长,则( )
![](https://img.xkw.com/dksih/QBM/2012/5/25/1573389862371328/1573389907140608/STEM/d6f389609d744efea46064c14493012a.png)
![](https://img.xkw.com/dksih/QBM/2012/5/25/1573389862371328/1573389907140608/STEM/c6c47c37da9e49c9a236d0f092ffe2c0.png)
![](https://img.xkw.com/dksih/QBM/2012/5/25/1573389862371328/1573389907140608/STEM/d6f389609d744efea46064c14493012a.png)
![](https://img.xkw.com/dksih/QBM/2012/5/25/1573389862371328/1573389907140608/STEM/c6c47c37da9e49c9a236d0f092ffe2c0.png)
A.a=b+c | B.b2=ac | C.a2=b2+c2 | D.a=b+2c |
您最近一年使用:0次