如图,某花木场有一块如四边形
形状的空地,其中
,其各边中点分别是E、F、G、H,测得对角线
,现想利用篱笆围成四边形
场地,则需篱笆的总长度是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/49dfe691-93a6-46ea-b270-4c49fba07f7a.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51f2d670e0a0ca9e766f29b24d78a3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e26cb268222e292c2d73fbf51fb1e0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/49dfe691-93a6-46ea-b270-4c49fba07f7a.png?resizew=200)
A.![]() | B.![]() | C.![]() | D.![]() |
12-13九年级上·江苏宿迁·阶段练习 查看更多[5]
(已下线)2012-2013学年江苏泗阳新阳中学九年级上第一次学情诊测数学试卷沪教版八年级下22.3 梯形(基础)巩固练习 人教版八年级下 第十八章 平行四边形 综合练习(2)湖北省熊家岩初级中学2021-2022学年八年级下学期期中考试数学试题甘肃省平凉市华亭市2022-2023学年八年级下学期期末数学试题
更新时间:2021-10-04 16:06:16
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【推荐1】如图,
,
,
,以下四个结论:①
;②
;③
;④CD平分
.其中结论正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/2a105834-8537-4dbf-9617-074aed730a56.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2ab6940dca62be1f3b2b5f8531990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b96d9fa7ebbc1c62304586ffc24f00f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0ca0f8b08b90a3f93f9dd746506ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2baa488ca5d8028583ad3a315e20e16f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e665ca3d41ea33bd4baa1b422af7c5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/2a105834-8537-4dbf-9617-074aed730a56.png?resizew=173)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】如图,在
和
中,
,
,
,点A在线段
上且
,
交
于点F,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a30b727be9c3adbb7dc85d72cc4dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78f1b109b3c6d2390f0afb8e2513d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e29b56159246cc50cfa21ba71241a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e5f23185221c0db8414ae478661fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/77293c92-f757-45e6-bfbc-54734e990bdc.png?resizew=159)
A.3 | B.![]() | C.![]() | D.6 |
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【推荐1】如图,在
中,
,BQ和AP分别为
和
的角平分线,若
的周长为18,
,则AB的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/0a726863-6e17-44e7-a283-6f3a8ca98fd4.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d00f4651b343dd8f9060c6460f0c955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83f70e69dca65099b91f61878b1ca27.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/12/0a726863-6e17-44e7-a283-6f3a8ca98fd4.png?resizew=143)
A.7 | B.8 | C.9 | D.6 |
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【推荐2】如图,在
中,
,以点
为圆心,适当长为半径画弧,分别交
,
于点
和
.再分别以点
,
为圆心,大于
的长为半径画弧,两弧在
内部交于点
,连接
并延长交
于点
,则下列结论一定成立的个数为( )
①
;
②若
,则
;
③若
,则点
在
的垂直平分线上;
④若
,
为
上一动点,则
的最小值为1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94e1ca12da27075e5241b7c7ce74672.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f22894a7e2d6183d2edff0c09286ab5.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c48119b3932497634478f656c752ec4.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/859c3bdde4cf8567ae5a57cdf5352f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/92d3b732-3182-47f7-b365-63f5d7fdc1ae.png?resizew=183)
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【推荐1】如图,在Rt△ABC中,∠C=90°,∠ABC=30°,AB=16,将△ABC沿CB方向向右平移得到△DEF,若四边形ABED的面积为24,则平移距离是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/caf21d62-f250-4b43-8ea2-9baf8b6dabaf.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/caf21d62-f250-4b43-8ea2-9baf8b6dabaf.png?resizew=215)
A.2 | B.3 | C.4 | D.6 |
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【推荐2】如图,y=
x与y=
(k>0,x>0)交于点A,将y=
x向上平移4个单位长度后,与y轴交于C,与双曲线y=
(k>0,x>0)交于B,若OA=3BC,S四边形OABC=( )
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736276379844608/2743436688457728/STEM/081f6d27-df40-413e-84bc-12d53d00aa7a.png)
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A.6![]() | B.![]() | C.4![]() | D.8 |
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【推荐1】如图,▱ABCD中,AB=2,AD=4,对角线AC、BD相交于点O,点E、F、G、H分别是AO、BO、CO、DO的中点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/5/6/2714953543049216/2716546293792768/STEM/f0ea2789bd5e40c4a2e6cac095574205.png?resizew=154)
![](https://img.xkw.com/dksih/QBM/2021/5/6/2714953543049216/2716546293792768/STEM/f0ea2789bd5e40c4a2e6cac095574205.png?resizew=154)
A.EH=HG |
B.△ABO的面积是△EFO的面积的2倍 |
C.EO=FO |
D.四边形EFGH是平行四边形 |
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【推荐2】点A,B的坐标分别为A (4,0),B(0,4),点C为坐标平面内一点,BC﹦2,点M为线段AC的中点,连接OM,则OM的最大值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/28/bfec20ee-54cb-432f-be00-d2385f896dfe.png?resizew=151)
A.2![]() | B.2![]() | C.4![]() | D.4![]() |
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