1 . 小明正在思考一道几何证明题:如图1,在正方形
中,点E,F在对角线
上,连接
,且
.求证:四边形
是菱形.
请指出小明想法中的错误之处,并按小明的思路,写出正确的证明.
![](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/3aece9b2a27753425a082d163357d948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
小明是这样想的: 第一步:由 ![]() ![]() ![]() ![]() ![]() 第二步:连接 ![]() ![]() ![]() ![]() ![]() 第三步:由 ![]() ![]() ![]() |
您最近一年使用:0次
2 . 一个四边形的模具如图1所示,其中
,
,
,
,
,按规定这个模具中
也应为直角,解答下列问题:
(2)如图2,连接
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/123495b5ed5ab2dbcfcd2fff0f96b827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14573d2f4cb25477f60d05e84313e57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
名校
3 . 如图,在平面直角坐标系中,点
,点
在
轴的正半轴上,以
为邻边作矩形
,连接
,
.
,求点
的坐标;
(2)如图
,点
为线段
上一点,连接
,作
垂足为
,设点
的纵坐标为
,线段
的长为
,求
与
之间的函数解析式(不要求写出自变量
的取值范围);
(3)如图
,在(
)的条件下,连接
,
为
轴负半轴上一点,延长
至点
,连接
,点
在线段
上,连接
,
,若
,
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e357eebd36c7985f6624b016be0edff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa3b68ece9e596ed7d4ec91a117218a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804be64f88b9ee896eb16b85eb4e593c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ebffbdca89cc68c33706ab069fc6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488c65067ebfe6cfbcf006f0be431518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032b3e422eeb39cf649dffc9934a7cf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071fb48b14fc3d0cb9b115482f000a82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fe4811ccac33668058724fa0331eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a7d5fc9ec294fb2c92c4bb72a594d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
您最近一年使用:0次
4 . 在平面直角坐标系
中,给出以下定义:对于x轴正半轴上的点
与y轴正半轴上的点
,如果坐标平面内存在一点N,使得
,且
,那么称点N为M关于P的“垂转点”.例如图1,已知点
和点
,以
为腰作等腰直角三角形
,可以得到M关于P的其中一个垂转点
.如图2,如果
关于y轴上一点P的垂转点N在一次函数
的图象上,那么垂转点N的坐标为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8293156150e4eb50a1bdd71090917dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17370a26980dab89d4546eeb7d9e6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb4eb87fd9c474fea913e4b68818abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6a05d58fd4527873e6edfb7789afe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c9dcfd9f4c5298035870cb88a34169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22840186db0afc0e2b2e8915ce79b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bfd8e9f2f08a5807a23677988b240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ecceb75be8d4fe129fa91f6e9a9809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a0d4c22734cac795de1e5c5fbefa87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
您最近一年使用:0次
名校
5 . 在平面直角坐标系
中,对于不在坐标轴上的点
,给出如下定义:取点
与点
,以
为直角边作等腰
,使
,且点C与点P在同一象限内,则称点C为点P的“对应点”,
为点P的“对应三角形”
(1)已知点P的“对应点”为点C,
①若点P的坐标为
,则点C的坐标为 ;
②若点C的坐标为
,则点P的坐标为 ;
(2)已知点
,过点P作x轴的垂线l,当直线l恰好将点Р的“对应三角形”的面积分成两个相等的部分时,求m,n满足的数量关系;
(3)已知点
,且满足
为定值,点C为点P的“对应点”,若
的最大值为2,直接写出k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dd2c7c5c431d8776ba4fb7acc78c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4776e87dd96658bb5ffe1b09cb98c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)已知点P的“对应点”为点C,
①若点P的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
②若点C的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a3619ccbcf65312754a970647014e5.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8d2945996691d56235b1defc0b7cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
您最近一年使用:0次
6 . 如图1,正方形
中,
,
.过A点作
轴于
点,过B点作x轴的垂线交过A点的反比例函数的图象于E点,交x轴于G点.
;
(2)求反比例函数的表达式及点E的坐标;
(3)如图2,连接
,点P为曲线
上一点,过点P作坐标轴的垂线,垂足分别为点M、N,所做的垂线交
于点Q、H,当
时,探究:
与
的数量关系,并说明理由;
(4)如图3,过点C作直线
,点P是直线l上的一点,在平面内是否存在点Q,使得点A、C、P、Q四个点依次连接构成的四边形是菱形,若存在,请直接写出点Q的横坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d563e1fcd5af55a3d5aa96f1eb54fa25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14fb45f3b5485ae0944808625c59af96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715d55d3441ce4df008c4d7ca4547ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d5dd681c3338418c7d2d7fe88d276.png)
(2)求反比例函数的表达式及点E的坐标;
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde10d25086f50dc74cbd09e9fee3ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07848a00d3056cfb12c1d4c02e37c68f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6918b1c300cc55aac7d4305a22d42946.png)
(4)如图3,过点C作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf1ee735951e75becc7ab229a13c1da.png)
您最近一年使用:0次
7 . 如图,
在平面直角坐标系中,顶点
,
在x轴上,顶点A在y轴的正半轴上,
,垂足是D,
交
于点E,
,
.请解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/345c1d96-a4cf-45be-9102-d509e583609c.png?resizew=142)
(1)求点B、点C的坐标;
(2)求线段
的长;
(3)连接
.若
,在坐标轴上是否存在点F,使
?若存在,请直接写出点F的个数和其中一个点F的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015588c83ec8316b0eb53f5e8e696621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cb66da86704cbbb985fd0b0b6c08c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.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/6ee3841395a418ff770fdf24d5b443f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f3460c4804c70eb4a5881835bfbabe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/345c1d96-a4cf-45be-9102-d509e583609c.png?resizew=142)
(1)求点B、点C的坐标;
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af9774200946261f0ccba3e6eeba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e98eee4406012be0a025d1427147c79.png)
您最近一年使用:0次
2024-04-04更新
|
258次组卷
|
3卷引用:专题19.27 一次函数(全章分层练习)(培优练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)
(已下线)专题19.27 一次函数(全章分层练习)(培优练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)黑龙江省牡丹江市2023-2024学年八年级上学期期末数学试题黑龙江省牡丹江市第十四中学2023-2024学年八年级上学期期末数学试题
8 . 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
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.
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.
(2)①在图2中,已知
,求证:
;
②在图3中,若
,则
的度数为________.
【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![]() ![]() ![]()
![]() ![]() 甲小组同学的证明思路如下: 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)
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)
甲小组同学根据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c4a875c62b36bcc95d629b780d8ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc77bde58cab23c53d53733c505115f9.png)
甲小组同学发现已知
![](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)
(2)①在图2中,已知
![](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/2b62b997ff70441a93e187bb04b51be5.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)
您最近一年使用:0次
10 . 如图,在等边三角形
中,E为
上一点,过点E的直线交
于点F,交
延长线于点D,作
垂足为G,如
,
,则
的长为( )
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827beb23a9fe02a8b588645bcb82ce67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-08更新
|
455次组卷
|
5卷引用:专题01 等腰三角形与直角三角形02(十二种考法)
(已下线)专题01 等腰三角形与直角三角形02(十二种考法)(已下线)猜想01 三角形(考题猜想,常考易错7个考点42题专练)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)广东省广州市天河区新昌学校2023-2024学年八年级上学期期中数学试题广东省珠海市香洲区2023-2024学年八年级上学期期末数学试题(已下线)专题06三角形全等、相似及综合应用模型(6大模型+解题技巧)-2024年中考数学答题技巧与模板构建(全国通用)