9-10高二下·河南焦作·期末
1 . 已知,如图,在梯形ABCD中,AD∥BC,AD=3,BC=7,点M,N分别是对角线BD,AC的中点,则MN=
![](https://img.xkw.com/dksih/QBM/2014/11/10/1571892604821504/1571892610424832/STEM/efd44bfec3544256b3ebb2de320a755f.png)
![](https://img.xkw.com/dksih/QBM/2014/11/10/1571892604821504/1571892610424832/STEM/efd44bfec3544256b3ebb2de320a755f.png)
A.2 | B.5 | C.![]() | D.![]() |
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10-11高二下·黑龙江牡丹江·期末
2 . 在
中,
是斜边上的高线,
则
为.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b28ef176d78867a81ac621c62e341b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91acc65064f9b4ce4520cac292a84a11.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 .
在⊙O外,
切⊙O于
,
交⊙O于
、
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10-11高二下·陕西·期中
4 . 如图4所示,圆O的直径AB=6,C为圆周上一点,BC=3过C作圆的切线l,过A作l的垂线AD,垂足为D,则∠DAC =
![](https://img.xkw.com/dksih/QBM/2011/5/13/1570196850991104/1570196856258560/STEM/eb8e0801d81048618f83ecf5b47b49e5.png)
![](https://img.xkw.com/dksih/QBM/2011/5/13/1570196850991104/1570196856258560/STEM/eb8e0801d81048618f83ecf5b47b49e5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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13-14高一·全国·课后作业
5 . 在直径为4的圆内接矩形中,最大的面积是( )
A.4 | B.2 | C.6 | D.8 |
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13-14高二·全国·课后作业
6 . 如图所示,已知⊙O的半径为5,两弦AB、CD相交于AB的中点E,且AB=8,CE∶ED=4∶9,则圆心到弦CD的距离为
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575004364800/1571575009558528/STEM/4227f57634a04273b68fcbb7a0d43dfa.png)
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575004364800/1571575009558528/STEM/4227f57634a04273b68fcbb7a0d43dfa.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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13-14高二·全国·课后作业
7 . 如图所示,P、Q分别在BC和AC上,BP∶CP=2∶5,CQ∶QA=3∶4,则
( ).
![](https://img.xkw.com/dksih/QBM/2014/8/6/1571833331859456/1571833337487360/STEM/0980595d6a6f4378a0e0dcc854488ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c3aea74102ef08bdd93016c249b7b0.png)
![](https://img.xkw.com/dksih/QBM/2014/8/6/1571833331859456/1571833337487360/STEM/0980595d6a6f4378a0e0dcc854488ed3.png)
A.3∶14 | B.14∶3 | C.17∶3 | D.17∶14 |
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