1 . 从4 地出发前往B地由于被一座山隔开而导致公路无法直达,需绕道C地,这大大影响了A、B两地居民的日常生活,现在国家决定投资从A地修建一条隧道(如图中虚线所示)穿过山直达 B地. 现在测得公路
长42千米,
长50千米,
的中点 D、
的中点E 之间距离
长20千米.A、B间直达公路通车后,通行距离将比原来绕道 C 地缩短了_______ 千米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
2024-06-02更新
|
60次组卷
|
3卷引用:河南省洛阳市西工区2023-2024学年八年级下学期期中数学试题
河南省洛阳市西工区2023-2024学年八年级下学期期中数学试题河南省洛阳市洛龙区2023-2024学年八年级下学期期中数学试题(已下线)专题6.7 三角形的中位线(分层练习)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)
2 . 证明:三角形的三条中线交于一点.
已知:如图,
、
是
的中线,
、
交于点O,连接
并延长交
于点F.
求证:
是
的中线.
小明进行了以下思考,证明:延长
至点G,使得
,连接
、
…
(请沿着小明的思考,将证明过程补充完整.)
已知:如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
小明进行了以下思考,证明:延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd011326209a8899b72489c75f7316be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
(请沿着小明的思考,将证明过程补充完整.)
您最近一年使用:0次
3 . 如图,平行四边形
的顶点
在等腰直角三角形
的边
上,点
在
的延长线上,
为
的中点,连接
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cf3f9a01a810792ebacc7f5bc70e97.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea147ada4f0aefdd3808a6a1133792eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a129e278b34ae1a844528cbf7315a872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cf3f9a01a810792ebacc7f5bc70e97.png)
您最近一年使用:0次
4 . 如图,某公园有一块三角形空地
,
米,沿
放置一道栅栏把
分成两个区域种植不同的花卉,点
、
分别是
、
的中点,则栅栏
的长为________ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
2024-05-18更新
|
94次组卷
|
3卷引用:第六章 平行四边形达标测试卷-2023-2024学年八年级数学下册《知识解读·题型专练》(北师大版)
(已下线)第六章 平行四边形达标测试卷-2023-2024学年八年级数学下册《知识解读·题型专练》(北师大版)湖南省邵阳市隆回县2023-2024学年八年级下学期期中数学试题吉林省松原市前郭县北部学区2023-2024学年八年级下学期期中数学试题
2024九年级下·全国·专题练习
5 . 如图,我们把依次连接任意四边形
各边中点所得四边形
叫中点四边形.
是菱形,则它的中点四边形
一定是 ;
A.菱形 B.矩形 C.正方形 D.梯形
(2)若四边形
的面积为
,中点四边形
的面积记为
,则
与
的数量关系是
=
;
(3)在四边形ABCD中,沿中点四边形EFGH的其中三边剪开,可得三个小三角形,将这三个小三角形与原图中未剪开的小三角形拼接成一个平行四边形,请画出一种拼接示意图,并写出对应全等的三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
A.菱形 B.矩形 C.正方形 D.梯形
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(3)在四边形ABCD中,沿中点四边形EFGH的其中三边剪开,可得三个小三角形,将这三个小三角形与原图中未剪开的小三角形拼接成一个平行四边形,请画出一种拼接示意图,并写出对应全等的三角形.
您最近一年使用:0次
6 . 【课本再现】
三角形的中位线定理:三角形的中位线平行于三角形的第三边,并且等于第三边的一半.
如图1,在
中,D,E分别是边
的中点.求证:
且
.
以下是小贤的证明思路:如图2延长
到点F,使
,连接
.
(1)请你根据小贤添加的辅助线,写出完整的证明步骤.
【知识应用】
(2)如图3,在四边形
中,E,F,G,H分别为各边中点.求证:四边形
是平行四边形.
(3)如图4,在四边形
中,对角线
与
相交于点H,E,F分别为边
的中点,连接
,分别交
于点M,N,且
.求证:
.
三角形的中位线定理:三角形的中位线平行于三角形的第三边,并且等于第三边的一半.
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e82a0f9712457f2dd9f8a93f8a217.png)
以下是小贤的证明思路:如图2延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9a9618018d717926540d1452f76e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09004de78fd10368a976cebf709355fb.png)
(1)请你根据小贤添加的辅助线,写出完整的证明步骤.
【知识应用】
(2)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(3)如图4,在四边形
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a81be7fd9af59fef27fcf46aebb86b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d85036bd851e7b3c60a4c85f8fd8e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01476dfb5970e27f54f742c27b9515f9.png)
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2024九年级下·全国·专题练习
7 . 如图,梯形
中,
,
是中位线,
于G,
于H,梯形的高
.沿着
,
分别把
,
剪开,然后按图中箭头所指方向,分别绕着点E,F旋转
,将会得到一个什么样的四边形?简述理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e76526b18b736232d9c273a07904dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb023313112cd8a6068d013fdcc9a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bb5ccceb997622add983ee2dc68522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ac267239af0197419d8f3b7d2959e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbf5459b20ca890a47ebf8d51d90cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6aaa4eac0d4ae4dedb7aa8a746c866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
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8 . 【问题初探】
(1)李老师给出如下问题:
中,
,且
,点
是
的中点,点
为对角线
上的点,且
,连接线段
.若
,求
的长.
是
的中点,从中点的角度思考,想办法构造另一个中点,从而形成中位线,所以想到连接
与
交于点
.请你利用李老师的提示,帮助小鹏同学解决这个问题.
【类比拓展】李老师为了帮助学生更好地感悟中点的解题策略,李老师提出了下面问题,请你解答.
(2)如图3,
中,
平分
于
.求证:
;
(3)如图4,在
,
点在
上,
分别是
的中点,连结
并延长,与
的延长线交于点
,连结
,若
,
,求
的长.
(1)李老师给出如下问题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f096fa0ac4f02ad185cefdd25b2ec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
【类比拓展】李老师为了帮助学生更好地感悟中点的解题策略,李老师提出了下面问题,请你解答.
(2)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5c9164163e8edf9837846e43fd4af0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fb784bc290b8c658bfed97f73ba5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be27d98c6c5afb37ec4b82b3d3c3b619.png)
(3)如图4,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aaec40543759c19bf9739ae9e41e22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecceb99d8e43d37b52cf43d9ccb62732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c8b21a087818284c9cd909cc56c814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fd1d513e614db05a08c754a3bd6cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad94a8254c5ff7602b2dd5abc394141a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
9 . 在
中,点
为边
的中点,过点
的动直线
可绕点
旋转,分别过点
作直线
的垂线,垂足分别为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/94b02427-3bf5-41d2-843d-53a96e035578.png?resizew=659)
(1)当直线
经过点
时,如图1,写出线段
与
的之间的数量关系,并给出证明;
(2)当直线
旋转到如图2、图3的位置时,线段
之间分别有怎样的数量关系,写出你的结论,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460c70650cd64f4e9373c2120ac9a1ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6241f9ef86cd0a902cbadaf336767dbc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/94b02427-3bf5-41d2-843d-53a96e035578.png?resizew=659)
(1)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b35a96bbf8960cf6cccfc8f0947bd9f.png)
您最近一年使用:0次
10 . 应用与探究
【情境呈现】
在一次数学兴趣小组活动中,小明同学将一大一小两个三角板按照如图1所示的方式摆放,其中
,
,
.他把三角板
固定好后,将三角板
从图1所示的位置开始绕点
按顺时针方向旋转,每秒转动
,设转动时间为
秒
.
【问题应用】(1)请直接写出图1中线段
的值;
(2)如图2,在三角板
旋转的过程中,连接
,当四边形
是矩形时,求
值;
【问题探究】(3)如图3,在三角板
旋转的过程中,取
的中点
,连接
,
是否存在最大值?若存在,请求出
的最大值,并直接写出此时的
值:若不存在,请说明理由.
【情境呈现】
在一次数学兴趣小组活动中,小明同学将一大一小两个三角板按照如图1所示的方式摆放,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74db1f028c135803c5f56852ec330d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157d8b528265b39efdcf4006c6de05d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fe4e8a3a3ea8627f7b1e968491ec1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab8a10e675354fa0c6e7da3d06b999d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741a44528782580d24249e8075b8cd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62221522235ecfa25d9787371560965.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/697dafa9-2374-4f33-a6fe-aa649688cb25.png?resizew=427)
【问题应用】(1)请直接写出图1中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如图2,在三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab8a10e675354fa0c6e7da3d06b999d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
【问题探究】(3)如图3,在三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab8a10e675354fa0c6e7da3d06b999d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2024-03-27更新
|
260次组卷
|
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