如图,在
和
中,
,
,
,连接
,
交于点
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2023/6/4/3252234102005760/3282347928068096/STEM/237cad7eb9d445359602d2d3d9e45719.png?resizew=106)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8807117d0d649419fdda04c531cdc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f18361878395eadef26378af2c5dbf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ffff38ea8b2d25cc4388774f1fdecbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/2023/6/4/3252234102005760/3282347928068096/STEM/237cad7eb9d445359602d2d3d9e45719.png?resizew=106)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-07-16 20:56:51
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【推荐1】根据下列已知条件,能画出唯一的△ABC的是( )
A.AB=3,BC=4,CA=8 | B.AB=4,BC=3,∠A=30° |
C.∠A=35°,∠B=65°,AB=7 | D.∠C=90°,AB=8 |
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【推荐2】如图是由6个边长相等的正方形组合成的图形,连接
、
、
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7eab9018d7d591d5fc76b0d9faff61c.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在矩形ABCD中,
,将矩形 ABCD绕着点A逆时针旋转一定角度得到矩形
,若点
落在边 CD上,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623147612676096/2624742249381888/STEM/bf6faa2d-00fc-484d-a7a9-6d8c3d10a6ea.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d3c7a53304669ad07e6a03558cb1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdd511e3eb724a9add64021b9b6f8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ccb9bf185db4e175cf983877356d99.png)
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623147612676096/2624742249381888/STEM/bf6faa2d-00fc-484d-a7a9-6d8c3d10a6ea.png?resizew=164)
A.30° | B.40° | C.45° | D.60° |
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【推荐2】如图,
中,
,
,
是斜边
的垂直平分线交
边于点
,连接
,则下列各线段之间的数量关系错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/282655aa-693b-4787-b75b-13e30ac922bf.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】等腰三角形的顶角是
,则它的底角的度数是( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,
中,DE是线段AC的垂直平分线,且分别交BC,AC于点D,E,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894306009874432/2973447899652096/STEM/9a8130a4-8df0-44df-aa6d-1c87f43b89c7.png?resizew=213)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d53c82934dd013b37e71f56fe0dbf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735bd70c2fa2bf51fd7aa448b20d0be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0c46783b77cce2bd4b45b9acc61884.png)
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894306009874432/2973447899652096/STEM/9a8130a4-8df0-44df-aa6d-1c87f43b89c7.png?resizew=213)
A.40° | B.45° | C.50° | D.55° |
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【推荐1】如图,将矩形ABCD沿EF折叠,使顶点C恰好落在边AB上的点C′上,且GE=GC′,若DE=3,AB=6,BC=9,则BF的长为( )
![](https://img.xkw.com/dksih/QBM/2021/12/7/2867247148744704/2868774952026112/STEM/feb2f85b-4362-4b5b-9f30-514c7dd6cca4.png?resizew=265)
![](https://img.xkw.com/dksih/QBM/2021/12/7/2867247148744704/2868774952026112/STEM/feb2f85b-4362-4b5b-9f30-514c7dd6cca4.png?resizew=265)
A.4 | B.3![]() | C.4.5 | D.5 |
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【推荐2】在
中,
,
,
,则斜边
上的高是( )
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A.9 | B.![]() | C.![]() | D.15 |
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