如图,在正方形ABCD中,E为边AD上的点,点F在边CD上,且CF=3FD,∠BEF=90°,若AB=4,延长EF交BC的延长线于点G,则BG的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/3c058263-3619-4ae8-9278-d17813b9046a.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/3c058263-3619-4ae8-9278-d17813b9046a.png?resizew=178)
A.8.5 | B.9 | C.9.5 | D.10 |
更新时间:2021-08-28 21:24:22
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【推荐1】如图,在四边形ABCD中,AB=BC,∠ABC=∠CDA=90°,BE⊥AD于点E,且四边形ABCD的面积为8,则BE=( )
![](https://img.xkw.com/dksih/QBM/2017/4/15/1666482419654656/1666973917626368/STEM/84006d5e-4837-484e-add2-a588986aeffc.png?resizew=175)
![](https://img.xkw.com/dksih/QBM/2017/4/15/1666482419654656/1666973917626368/STEM/84006d5e-4837-484e-add2-a588986aeffc.png?resizew=175)
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【推荐2】如图,
、
是菱形
的两条对角线,反比例函数
的图像经过点A、C且关于直线
对称,若
,
,则k的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/0e9ec035-d4c9-43d9-b724-f14aa86e045b.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03517310ea1e913f709753592ac65ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95271260f64fb23315953979002f7ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/0e9ec035-d4c9-43d9-b724-f14aa86e045b.png?resizew=195)
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【推荐3】如图,四边形OAA1B1是边长为1的正方形,以对角线OA1为边作第二个正方形OA1A2B2,连接AA2,得到
AA1A2;再以对角线OA2为边作第三个正方形OA2A3B3,连接A1A3,得到
A1A2A3,再以对角线OA3为边作第四个正方形OA2A4B4,连接A2A4,得到
A2A3A4,…,设
AA1A2,
A1A2A3,
A2A3A4,…,的面积分别为S1,S2,S3,…,如此下去,则S2020的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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【推荐1】如图,在
中,点D为
上一点,
交
于点E,点F为
上一点,连接
交
于点G,下列结论一定正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/10c62fa4-60cf-4b2b-b6d8-1bf25e398c21.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在
中,
,点D、E在
边上,
,若
,则
的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/12/7/2608965602000896/2609218740240384/STEM/e2c42a220ec8416a93641dbe8e418395.png?resizew=318)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ca17d7bafd4cf6e032f475391ca4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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