如图,在矩形
中,
,
,
为
上两点,且
,则四边形
周长的最小值为( )
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733784320147456/2733873076559872/STEM/616fab67-ef09-4604-b55c-d5447c75f362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585288e61871608f6ff8f7e4a0beafbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e3f3f09715fd737324ea48c3696485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bddc68ed03fe7fd1fe30a5e626ba435.png)
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733784320147456/2733873076559872/STEM/616fab67-ef09-4604-b55c-d5447c75f362.png)
A.9 | B.10 | C.11 | D.12 |
20-21八年级下·浙江杭州·期中 查看更多[3]
(已下线)【新东方】【2021.5.20】【WZ】【初二下】【初中数学】【WZ00183】(已下线)专题01 矩形中的最值-【微专题】2022-2023学年九年级数学上册常考点微专题提分精练(北师大版)浙江省温州市瑞安市安阳实验中学2020-2021学年八年级下学期期中数学试题
更新时间:2021-06-01 23:01:55
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【推荐1】如图,
,点
在
上且
,点
、
分别是
、
上的动点,则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/97a3d5c2-dfaa-463d-bf1d-db97f85cb804.png?resizew=234)
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![](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/62ddeb7ce17137144641f061042c14fb.png)
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A.2 | B.4 | C.![]() | D.![]() |
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【推荐2】如图,
的周长为16.点
是
边的中点,
=2,过点
作
的垂线
,
是
上任意一点,则
的周长最小值为( )
![](https://img.xkw.com/dksih/QBM/2020/4/16/2442910224572416/2443522430623744/STEM/98c4375198f441fc9ee86cb168e9843e.png?resizew=138)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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A.12 | B.14 | C.16 | D.18 |
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解题方法
【推荐1】如图,在四边形ABCD中,∠ADC=∠ABC=90°,AB=BC=5,BD=7,则Rt△ADC的周长为( )
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805672842149888/2807103460597760/STEM/75457959c16540bfacc601947d10da36.png?resizew=113)
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805672842149888/2807103460597760/STEM/75457959c16540bfacc601947d10da36.png?resizew=113)
A.5![]() | B.7![]() | C.9![]() | D.12![]() |
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真题
【推荐2】如图,矩形
中,
和
相交于点O,
,
,点E是
边上一点,过点E作
于点H,
于点G,则
的值是( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827beb23a9fe02a8b588645bcb82ce67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d406fc69d68b6ffbd3b185e11c0ec9ea.png)
A.2.4 | B.2.5 | C.3 | D.4 |
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【推荐1】如图,在长方形ABCD中,AB=12,AD=14,E为AB的中点,点F,G分别在CD,AD上,若CF=4,且△EFG为等腰直角三角形,则EF的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/4981080f-8b97-4f27-9534-9c5c2b10f51b.png?resizew=103)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/4981080f-8b97-4f27-9534-9c5c2b10f51b.png?resizew=103)
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【推荐2】如图,在矩形ABCD中,AB=2,AD=4,E为CD的中点,连结AE并延长,交BC的延长线于点F,点P为BC上一点,当∠PAE=∠DAE时,则AP的长度为( )
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