如图,直角梯形
中,
,
,
,过
,
,
三点的
分别交
,
于点
,
,且
,下列结论:①
;②
;③
的直径为
;④
.其中正确的结论是( )
![](https://img.xkw.com/dksih/QBM/2018/8/3/2002549462900736/2004455620681728/STEM/6f8e7fd6913c44a29ca334783b81eada.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c04230d9ddfa812c84339856d598f49c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e7f748d88b4eadfd1643c6b31fdf08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f927c0e469bae17b902f3b4df617610c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3fc97517458a862729f79f97336b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a340a1efc00f4ead0e82d8090042b2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cbb271baca5cd015f30e07d9eebfd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d151c74adc011000ec8fbb461650cb5f.png)
![](https://img.xkw.com/dksih/QBM/2018/8/3/2002549462900736/2004455620681728/STEM/6f8e7fd6913c44a29ca334783b81eada.png?resizew=111)
A.①②③ | B.①②④ | C.①③④ | D.①②③④ |
更新时间:2018-08-06 09:38:18
|
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【推荐1】如图,已知
中,
,点
为
上一动点,
,连接
.
与
交于点
,
,若
,则
( )
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A.![]() | B.![]() | C.6 | D.![]() |
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【推荐2】如图,菱形
的边长为
,且
,
、
、
、
分别为
、
、
、
的中点,以
、
、
、
四点为圆心,半径为
作圆,则图中阴影部分的面积是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/a5e2d247-b01c-465b-b80c-14d07333e50a.png?resizew=199)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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【推荐1】如图1,在
中,
是斜边
的中点,动点
从点
出发,沿
运动,设
,点
运动的路程为
,若
与
之间的函数图象如图2所示,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586490904944640/2589050932486144/STEM/f7556ad88cd84a4c8d2f55aebf9aa8f5.png?resizew=486)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d0984bb4715e5e6100153012ddc5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6442a2fb06f82612e8cc2ad582d49f89.png)
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【推荐2】如图,在
中,AB=AC=6,∠B=45°,D是BC上一个动点,连接AD,以AD为边向右侧作等腰
,其中AD=AE,∠ADE=45°,连接CE.在点D从点B向点C运动过程中,
周长的最小值是( )
![](https://img.xkw.com/dksih/QBM/2020/12/1/2604789262467072/2611449444515840/STEM/10d4ba992da44a06ae13d09e13acf4ab.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】如图,AB是半圆直径,半径OC⊥AB于点O,AD平分∠CAB交弧BC于点D,连结CD、OD,给出以下四个结论:①AC∥OD;②CE=OE;③△ODE∽△ADO;④
.其中正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/2018/8/16/2011677127245824/2013084236505088/STEM/4aa39112a9d84d23b903ad9e9a49b054.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322e2eaae5332577556554ea201a940e.png)
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A.1个 | B.2个 | C.3个 | D.4个 |
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解题方法
【推荐2】如图,在Rt△ABC中,∠ACB=90°,AC=BC=4,将△ABC绕点A沿顺时针方向旋转后得到△ADE,直线BD、CE相交于点O,连接AO.则下列结论中:①△ABD∽△ACE;②∠COD=135°;③AO⊥BD;④△AOC面积的最大值为8,其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/27eac817-fb5a-4c7b-a5c1-db6c1c259f8e.png?resizew=248)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/27eac817-fb5a-4c7b-a5c1-db6c1c259f8e.png?resizew=248)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
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【推荐1】如图放置的两个正方形,大正方形ABCD边长为a,小正方形CEFG边长为b(a>b),M在BC边上,且BM=b,连接AM,MF,MF交CG于点P,将△ABM绕点A旋转至△ADN,将△MEF绕点F旋转至△NGF.给出以下五个结论:①∠AND=∠MPC;②
;③△ABM≌△NGF;④
;⑤A,M,P,D四点共圆.其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/23/3f2a3c46-6720-4cba-bd3a-2becf8d51a6f.png?resizew=171)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c6d752b1f44cec98cee85f3349b1b8.png)
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A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
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【推荐2】如图,等腰
内接于
,直径
,D是圆上一动点,连接
,且
交
于点G.下列结论:①
平分
;②
;③当
时,四边形
的周长最大;④当
,四边形
的面积为
.其中正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325981a53b1b8a2dcd68357f3f947e50.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae33911e41aa2f7004cc01e336f96bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae33911e41aa2f7004cc01e336f96bf0.png)
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A.1 | B.2 | C.3 | D.4 |
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