1 . 如图,
中,
,
,点D,F分别为
的中点,且
,点M为线段
上一动点,当
的面积为12时,
周长的最小值为 _____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ca0f2b2b40440365fcce22ac32c0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb3ea779c9f0edb28aa521056831852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/4af93517-9338-4ac8-b44f-7b6458487ff6.png?resizew=151)
您最近一年使用:0次
2 . 如图,在中,
,
的平分线交
于点D,
垂直平分
,垂足为E,若
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/80e35094-f65c-406e-8c33-e40b9526c718.png?resizew=140)
您最近一年使用:0次
3 . 如图,在中,
,直线
是
中
边的垂直平分线,
是直线上的一动点,
周长的最小值为
您最近一年使用:0次
4 . 如图,,
,
的垂直平分线
交
于点
,则
的周长为
.
您最近一年使用:0次
5 . 如图,在
中,
,分别以点
为圆心,
长为半径作弧,两弧交于点
(与点
不重合),连接
,记
与
的交点为
.
(2)求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc5ea9810b67acbc7e9006fb6f8316f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace68d1533a16515a95d8bbf96276a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
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6 . 如图,在
中,
,分别以点A,B为圆心,以大于
的长为半径作弧,两弧分别交于点M,N(点M在
上方),作直线
交
边于点D;在
和
上分别截取
、
,使
,分别以点E,F为圆心,以大于
的长为半径作弧,两弧在
内交于点P,作射线
,若射线
恰好经过点D,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1fd8b62412e37e56ed2ecffb228c543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ff8c8d239cc12ddc3a899e9f054aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c390d67e0d91ae3ad99cf6a9d173f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d092504d3c33c48be43f23b788efd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10681704c4fccfd37664eaf34391dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e16965b76e9302c5d63d177cf36000.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-14更新
|
114次组卷
|
2卷引用:贵州省铜仁市沿河土家族自治县初中第一集团2023-2024学年八年级上学期第二次统考数学试题
7 . 如图,在
中,
,
,以A为圆心,任意长为半径画弧分别交
、
于点M和N,再分别以M、N为圆心,大于
的长为半径画弧,两弧交于点P,连接
并延长交
于点D,则下列说法中正确的个数是( )
①
是
的平分线;②
;③点
在
的垂直平分线上;④若
,则点D到
的距离是
;⑤
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/c2982bed-7c72-4c6c-ab77-6a6ea9988496.png?resizew=156)
![](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/56d3c9ce32b721995f355eea411340e3.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/c94e1ca12da27075e5241b7c7ce74672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](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/d7ba841469751fbbe3bb32d8104e7ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce69da5d176a47b204094002d863c787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7e04484a0148fb7cde655ee3a41e77.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/c2982bed-7c72-4c6c-ab77-6a6ea9988496.png?resizew=156)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
8 . 如图,已知等边三角形
的边长是
,且高
,P为
上一动点,D为
的中点,则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95f9bc15c561fae220f26e44025ada13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79aee32def2f182e08e1576a928a6dd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9afd460d7f037a24d23542a9288ab35.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/35492ccd-3262-4568-a4b1-de40bb04a996.png?resizew=129)
您最近一年使用:0次
9 . 如图,在
中,
的垂直平分线
交
于点
,交
于点
,交
于点E,且
的周长等于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/e8d0b7ca-5147-4bb4-be61-ca34550d5463.png?resizew=144)
(1)求
的长;
(2)若
,并且
,求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bdd546cfe05b4604e7e29d41f75a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5df73433f151b6016f23788ebd995ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/e8d0b7ca-5147-4bb4-be61-ca34550d5463.png?resizew=144)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee54b9b398ce80cd054b56173fe810f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
您最近一年使用:0次
10 . 如图,点O是矩形纸片
对角线
的中点,E是
上一点,将纸片沿
折叠后,点B恰好与点O重合,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeac50f03177b0c616dc4dc6d9e579b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/8631d14d-68f1-4cfa-ad40-35c837ad1b1d.png?resizew=150)
您最近一年使用:0次