如图,在
中,
,
,
是
边上的中线,E是
边上一动点,将
沿
折叠得到
,若点F(不与点C重合)落在
的角平分线所在直线上,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eeb19c687c0b6b0c6c0291a15b870f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/4250141a-2eca-478b-89be-f82cdefac54f.png?resizew=162)
2023·河南开封·一模 查看更多[1]
更新时间:2023-04-25 14:35:10
|
相似题推荐
填空题
|
较难
(0.4)
【推荐1】已知a,b是正整数,若有序数对(a,b)使得
的值也是整数,则称(a,b)是
的一个“理想数对”,如(1,4)使得
=3,所以(1,4)是
的一个“理想数对”.请写出
其他所有的“理想数对”: __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bba0406454f95057ee762f3c841ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bba0406454f95057ee762f3c841ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bba0406454f95057ee762f3c841ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bba0406454f95057ee762f3c841ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bba0406454f95057ee762f3c841ed7.png)
您最近一年使用:0次
填空题
|
较难
(0.4)
【推荐2】如图,在直角坐标系中,点A的坐标为
,以线段
为边在第四象限内作等边
,点
为x轴正半轴上一动点,连接
,以线段
为边在第四象限内作等边
,直线
交y轴于点E,则四边形
的面积是____________ .(结果用含a的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af4689cb01966459748df0c4daa9f5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
您最近一年使用:0次
填空题
|
较难
(0.4)
名校
【推荐1】如图,D是等边三角形ABC外一点,AD=6,CD=4,当BD长最大时,△ABC的面积为_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/d251c147-590d-4208-ad57-2d4af98510e2.jpg?resizew=113)
您最近一年使用:0次
填空题
|
较难
(0.4)
【推荐2】如图,△ABC是等腰三角形,AB=AC,∠B=30°,△ADE是直角三角形,∠ADE=90°,∠E=30°,AD=AB.将△ADE绕点A旋转,AD、AE分别交BC于点F,G,当∠AGB=75°时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737a0daa12b18641540b94736ee1a77d.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737a0daa12b18641540b94736ee1a77d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/80155ba8-7c22-4477-b4fe-46b8db00905c.png?resizew=156)
您最近一年使用:0次
填空题
|
较难
(0.4)
名校
【推荐1】“勾股图”有着悠久的历史,欧几里得在《几何原本》中曾对它做了深入研究.如图,在△ABC中,
,分别以△ABC的三条边为边向外作正方形.连接EB,CM,DG,CM分别与AB,BE相交于点P,Q.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6217ba54baf35aca59d9b89ded7367e.png)
___________ °,
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2169fbc9906e63670e965f9a4a0279a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6217ba54baf35aca59d9b89ded7367e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d785298c29a73b87400a994776084563.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/dad3db9c-91f5-458d-ab6c-4cb601ff4c47.png?resizew=157)
您最近一年使用:0次
填空题
|
较难
(0.4)
名校
【推荐2】如图,在
中,
,
,点
为边
的中点,点
是边
上的一个动点,连接
,将
沿
翻折得到
,线段
交边
于点
.当
为直角三角形时,
的长为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4f0c1c9cca0555906d8a53e1a6803d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ab4e30ef4f3c4ccb981c1c43d4657e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab41cce6eb2d3058a644314865d16548.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/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
填空题
|
较难
(0.4)
【推荐1】如图,在
中,
,
,
点
是边
的中点,点
是边
上的一动点
不与
重合
,连接
,将
沿
翻折得
,连接
、
,当线段
的长取最小值时,
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648b4663c0842b2b22a20aab7ea0acce.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
您最近一年使用:0次
填空题
|
较难
(0.4)
【推荐2】如图,△ABC中,AB=AC,∠BAC=62°,∠BAC的平分线与AB的垂直平分线交于点O,将∠C沿EF(E在BC上,F在AC上)折叠,点C与点O恰好重合,则∠OEC为_____ 度.
![](https://img.xkw.com/dksih/QBM/2020/10/4/2563737666428928/2565199385935872/STEM/90b26b40c3a24787a6214904957f26dc.png?resizew=141)
您最近一年使用:0次