如图,
中,分别以点B,D为圆心,大于
的长为半径画弧,两弧交于点M,N,直线
分别交
,
于点E,F,连接
、
,若
,
,
,则线段
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81613520ab5a478f0b2616a9bcb79d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
A.![]() | B.![]() ![]() | C.3 | D.![]() |
更新时间:2023-04-04 17:35:20
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【推荐1】如图,在Rt△ABC中,∠BAC=90°,∠ABC的平分线BD交AC于点D,DE是BC的垂直平分线,点E是垂足.已知DC=5,AD=3,则图中长为4的线段有( )
![](https://img.xkw.com/dksih/QBM/2018/8/17/2012444955254784/2013371068440576/STEM/ce8a083363e640c4af746365c075b233.png?resizew=205)
![](https://img.xkw.com/dksih/QBM/2018/8/17/2012444955254784/2013371068440576/STEM/ce8a083363e640c4af746365c075b233.png?resizew=205)
A.4条 | B.3条 | C.2条 | D.1条 |
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【推荐2】已知:
是三边都不相等的三角形,点
是三个内角平分线的交点,点
是三边垂直平分线的交点,当
、
同时在不等边
的内部时,那么
和
的数量关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0433f8116768b42642a7f7e5977ce6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/5631507a-e4d5-4d23-bf90-8a3a9441b5c3.png?resizew=153)
A.![]() | B.![]() |
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【推荐1】《几何原本》关于毕达哥拉斯定理,欧几里德给出证明.如图,
中,
,以AC,BC,AB为边分别向外作正方形,连结CD,CE,过C作
,
的面积为
,
的面积为
,若
,
,则正方形BCGH的边长( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/6b15f3fc-e7f7-4daf-bf94-c620f005af6a.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cc087c22e1fc1197236c71e5465d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12de78c7b70bb71e20ffdaecf400b930.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/6b15f3fc-e7f7-4daf-bf94-c620f005af6a.png?resizew=184)
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【推荐2】往直径为
的圆柱形容器内装入一些水以后,截面如图所示,若水的最大深度为
,则水面
的宽度为( )
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650162072018944/2651744701513728/STEM/dacac933-acab-42c3-9414-d520ff542762.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2201522a92814bcd11eb462f17551339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af62da2f87dfc02c63e7a1c0949f09d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650162072018944/2651744701513728/STEM/dacac933-acab-42c3-9414-d520ff542762.png?resizew=164)
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【推荐1】如图,
是平行四边形
的对角线交点,
为
中点,
交
于点
,若平行四边形
的面积为
,则
的面积是( )
![](https://img.xkw.com/dksih/QBM/2020/4/28/2451288135385088/2453940111548416/STEM/78712ef3-1b0c-43af-bedd-fd6305d764b6.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐2】如图,点P是平行四边形ABCD内一点,已知S△PAB=7,S△PAD=4,那么S△PAC等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/04704ecc-bc76-4c55-a04d-684c7f08ccb1.png?resizew=214)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/04704ecc-bc76-4c55-a04d-684c7f08ccb1.png?resizew=214)
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【推荐1】如图,若
和
的面积分别为
、
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/c15f238a-45ba-4f05-afd2-b15dffa38a71.png?resizew=274)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/c15f238a-45ba-4f05-afd2-b15dffa38a71.png?resizew=274)
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