1 . 如图,点A,B,C在半径为4的
上,
,
,垂足为E,交
于点D,连接
,则
的长度为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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名校
2 . 如图,在四边形
中,
,
为对角线
、
的交点,且
.
为平行四边形.
(2)若
,
,求
与
之间的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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3 . 如图,A市气象站测得台风中心在A市正东方向
的B处,以
的速度向北偏西
的
方向移动,距台风中心
范围内是受台风影响的区域.
(2)如果A市受这次台风影响,那么受台风影响的时间有多长?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5167ec8605a15265d019fb1c718adf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5240f45da617379f6977315ba693f51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51cb56b8a5dbd2a28d5722aaa58b5789.png)
(2)如果A市受这次台风影响,那么受台风影响的时间有多长?
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2024八年级下·全国·专题练习
4 . 如图,菱形
中,
,
,点
为
边上任意一点(不包括端点),连结
,过点
作
,交边
于点
,点
线段
上的一点.
为菱形
对角线的交点,
为
的中位线,求
的值;
(2)当
的值最小时,请确定点
的位置,并求出
的最小值;
(3)当
的值最小,且
的值最小时,在备用图中作出此时点
,
的位置,写作法并写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2952c1bb3373bd9cb2b8c59c8ec55f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078837d73bad954fc4c19d4162fa8922.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078837d73bad954fc4c19d4162fa8922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078837d73bad954fc4c19d4162fa8922.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078837d73bad954fc4c19d4162fa8922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70564a8e051f8a065127a64f78f15e2a.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/70564a8e051f8a065127a64f78f15e2a.png)
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5 . 如图,在
中,
是
上一点,连结
,分别以
为边作
,连结
.则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d3a82be1c90c1be88285eee058e148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1443bfe022f648f813fb1e15b2d78b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea19f8929bf52dbe22ca488718bcadcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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6 . 重庆动物园顶流明星—一大熊猫“渝可、渝爱”人气爆棚,吸引了全国各地的游客前来拍照打卡.如图,三角形观赏区
紧邻四边形熊猫馆
.经测量,点C在点B的正东方向,点A在点B的北偏东
方向,点E在点B的正北方向且在点A的正西方向,点D在点A的正东方向且在点C的北偏东
方向.
长30米,
长40米.(参考数据:
,
)
的长度;(结果精确到1米)
(2)天气炎热时,饲养员会在点D处为熊猫放置冰块帮助熊猫降温.渝可从B出发沿
到达点D,渝爱从B出发沿
到达点D,请计算说明哪只熊猫选择的路线较近?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c894b7d6baa55c80c64e74748dad898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)天气炎热时,饲养员会在点D处为熊猫放置冰块帮助熊猫降温.渝可从B出发沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760a51352cf6fc58a0cd0797763b90eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ccfc06739ab01294379f26e1c8124a0.png)
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7 . 如图1,平行四边形
中,
,
,点P从点A出发,沿
以每秒1个单位长度的速度匀速运动到点B,图2是点P运动时,
的周长y随时间
变化的关系图象,则平行四边形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93380ab8eccc6e6f11bdf19ffc2d4cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c8119fa3ded1d2846e246e17925c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa97e9662b5562eec0fbf01d784e491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.8 | B.![]() | C.![]() | D.4 |
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8 . 【基础巩固】(1)如图1,在
中,D、E、F分别为
上的点,
交
于点G,求证:
;
【尝试应用】(2)如图2,在(1)的条件下,连接
.若
,求
的值;
【拓展提高】(3)如图3,在平行四边形
中,
与
交于点O,E为
上一点,
交
于点G,
交
于点F.若
平分
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd402c3da04c4a3a8cf85556de1d79f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88654c1821a737536d14cd355419d125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a329bec5627bf0eb930d1406ac13e483.png)
【尝试应用】(2)如图2,在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0063d673dcd43dc7d13d43aa7dc4ea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2331e09bdf3c0003f4b2cc75fb15604e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f4f8e27f307a8a998a3335ba7d1bb4.png)
【拓展提高】(3)如图3,在平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dedb84c3bb18d96714b9154e927683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6ffa9263b13fb5a51434e199619f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e458dd1ce1c8dcdc2becac146d9dc231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10330b7483f33138d2e7defb9d5c2394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d2892c2712c836435441f8fbcfd883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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解题方法
9 . 综合与实践
完成任务:
(1)填空:上述材料中的依据是________(填“
”或“
”或“
”或“
”)
【发现问题】
同学们通过交流后发现,已知
可证得
,已知
同样可证得
,为了验证这个结论是否具有一般性,又进行了如下探究.
【迁移探究】
(2)在正方形
中,点E在
上,点M,N分别在
上,连接
交于点P.甲小组同学根据
画出图形如图2所示,乙小组同学根据
画出图形如图3所示.甲小组同学发现已知
仍能证明
,乙小组同学发现已知
无法证明
一定成立.
,求证:
;
②在图3中,若
,则
的度数为多少?
【拓展应用】
(3)如图4,在正方形
中,
,点E在边
上,点M在边
上,且
,点F,N分别在直线
上,若
,当直线
与直线
所夹较小角的度数为
时,请直接写出
的长.
数学课上,老师提出了这样一个问题:如图1,在正方形![]() ![]() ![]()
由同角的余角相等可得 ![]() ![]() ![]() ![]() ![]() 乙小组的同学猜想,其他条件不变,若已知 ![]() ![]() 由 ![]() ![]() ![]() ![]() ![]() |
(1)填空:上述材料中的依据是________(填“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a290f047f50481318d040c604d72f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beb8b968744573e593ac28451c69729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4351a730f61bb998bab8f0b7848912d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5eb2decaa6be2df36a5e4b7fabf585d.png)
【发现问题】
同学们通过交流后发现,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
【迁移探究】
(2)在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96f8239510ab14f8c084b5e78b5b8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c4a875c62b36bcc95d629b780d8ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc77bde58cab23c53d53733c505115f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c4a875c62b36bcc95d629b780d8ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc77bde58cab23c53d53733c505115f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc77bde58cab23c53d53733c505115f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c4a875c62b36bcc95d629b780d8ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c4a875c62b36bcc95d629b780d8ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc77bde58cab23c53d53733c505115f9.png)
②在图3中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9ab5a9114daaa0fd3f6c5f1885f90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b14ee179b2f15c7c7ba0a82cdd67234.png)
【拓展应用】
(3)如图4,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf74dd4bb5a02861f38efcf8f3d5d7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eceff9b68796f5ccd4daa4028e3a182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f22a1134cfeea008409510d719041fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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7日内更新
|
115次组卷
|
5卷引用:河南省部分学校2024年中考模拟考试数学模拟试题
河南省部分学校2024年中考模拟考试数学模拟试题(已下线)专题06 四边形常见模型(考点清单+7种题型解读)-2023-2024学年八年级数学下学期期中考点大串讲(苏科版)(已下线)专题03平行四边形(考题猜想,5种模型与解题方法)-2023-2024学年八年级数学下学期期中考点大串讲(沪教版)2024年广西防城港市中考数学二模试题(已下线)八年级数学期末模拟卷(苏州专用,测试范围:苏科版八下全册+一元二次方程+相似)-学易金卷:2023-2024学年初中下学期期末模拟考试
10 . 在周长为24的菱形
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