如图,
中,
,
为
中点,且
,
,
分别平分
和
,交于
点,则
的最小值为( ).
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455668302462976/2456248379260928/STEM/820d6875360e47b0966f8c51f0e2e09c.png?resizew=156)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455668302462976/2456248379260928/STEM/820d6875360e47b0966f8c51f0e2e09c.png?resizew=156)
A.1 | B.![]() | C.![]() | D.![]() |
更新时间:2020-05-08 14:58:29
|
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【推荐1】如图,在平面直角坐标系中,
的顶点A,B在反比例函数
的图象上,点A的纵坐标为4,点B的纵坐标为1,
,
轴,若
的面积为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272867d48283a6f437c142d6b129df1a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70c93718be1e6197b7783d62c963ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272867d48283a6f437c142d6b129df1a.png)
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A.![]() | B.27 | C.3 | D.6 |
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【推荐2】如图,直线
与
在第二象限交A,
交x轴于B,且
,
,
,则方程组
的解为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/7ffd5426-7e22-4332-bec5-be072dd0ff45.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b343d77ee4dced82ecc479206c42977d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595300f17e2fc83c158f7c6d2f8acf79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e136e7637543c8ae92c8dcd55b31924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa50346237f69307a6f08037562e67e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45f12d765cbed18d0fd3d3aea2676cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f87f49e30ad615b39f050c0ec69414d.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,∠ACB=60○,半径为1的⊙O切BC于点C,若将⊙O在直线CB上沿某一方向滚动,当滚动到⊙O与CA也相切时,圆心O移动的水平距离为( )
![](https://img.xkw.com/dksih/QBM/2021/12/25/2880056947507200/2880376191246336/STEM/2c1a0fa8-b93f-4d0e-9487-5fcc566b8585.png?resizew=173)
![](https://img.xkw.com/dksih/QBM/2021/12/25/2880056947507200/2880376191246336/STEM/2c1a0fa8-b93f-4d0e-9487-5fcc566b8585.png?resizew=173)
A.![]() | B.![]() | C.π 或![]() | D.![]() ![]() |
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真题
名校
【推荐2】下列命题中是假命题的是( )
A.三角形的中位线平行于三角形的第三边,并且等于第三边的一半 |
B.如果两个角互为邻补角,那么这两个角一定相等 |
C.从圆外一点可以引圆的两条切线,它们的切线长相等,这一点和圆心的连线平分两条切线的夹角 |
D.直角三角形斜边上的中线等于斜边的一半 |
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【推荐1】如图,点
是
的内心,
的延长线和
的外接圆相交于点
,与
相交于点
,则下列结论:①
;②若
,则
;③若点
为
的中点,则
;④
.其中一定正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/087d44ea-a1b1-4e2b-9361-25f70f2f6efd.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba77f66ecad8eb4a7a63f169f28a3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ee8de2d272e8a3cad423ef206cd7eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2549a1964e7221d4b82698d0afa9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e792b0ef3d542237ed0903194597651.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/087d44ea-a1b1-4e2b-9361-25f70f2f6efd.png?resizew=185)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】如图,点I为
的内切圆的圆心,连接
并延长交
的外接圆于点D,连接
,若
,则
的长为( ).
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A.1 | B.2 | C.2.5 | D.3.5 |
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