如图,二次函数y=﹣x2+3x+m的图象与x轴的一个交点为B(4,0),另一个交点为A,且与y轴相交于C点.
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297683052273664/2298521269346304/STEM/bcd9a1707467499a9a33bc4c2cec5179.png?resizew=112)
(1)求m的值及C点坐标;
(2)在抛物线的对称轴上是否存在一点M,使得它到B、C两点的距离和最小,若存在,求出此时M点坐标,若不存在,请说明理由;
(3)P为抛物线上一点,它关于直线BC的对称点为Q,当四边形PBQC为菱形时,请直接写出点P的坐标.
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297683052273664/2298521269346304/STEM/bcd9a1707467499a9a33bc4c2cec5179.png?resizew=112)
(1)求m的值及C点坐标;
(2)在抛物线的对称轴上是否存在一点M,使得它到B、C两点的距离和最小,若存在,求出此时M点坐标,若不存在,请说明理由;
(3)P为抛物线上一点,它关于直线BC的对称点为Q,当四边形PBQC为菱形时,请直接写出点P的坐标.
更新时间:2019-09-25 20:56:24
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】定义:我们把形如
(
)的函数称为一次函数
的“相反函数”.比如:函数
是一次函数
的“相反函数”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/019ae920-5440-4ea3-9786-584ffa1b2c83.png?resizew=290)
(1)如图1,一次函数
的图象交
轴、
轴于点
、
,请在图中画出该一次函数的“相反函数”
的图象;
(2)写出一次函数
与“相反函数”
(
)之间的性质(至少两条);
(3)在(1)中,如果函数
、
的图象交点为
,
、
与
轴分别交于点
、
.求
的角平分线与对边的交点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bafd9c838624fcf49967608b8e240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceae2195a53fbdefb4539e04326b232a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650353eda77d014bb42d185bd967e549.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/019ae920-5440-4ea3-9786-584ffa1b2c83.png?resizew=290)
(1)如图1,一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cfa2a6d9749a619edf80bad8b3e4962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fed700b7a3ab2ee7fbae12507033af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)写出一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bafd9c838624fcf49967608b8e240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
(3)在(1)中,如果函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】课本第7页介绍:美国总统伽菲尔德利用图1验证了勾股定理,直线l过等腰直角三角形
的直角顶点C:过点A作
于点D,过点B作
于点E研究图形,不难发现:
.(无需证明):
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/11/962f2b4d-ee48-4e34-960a-f665a77f0c17.png?resizew=523)
(1)如图2,在平面直角坐标系中,等腰
,
,
,点C的坐标为
,A点的坐标为
,求B点坐标;
(2)如图3,在平面直角坐标系中,直线
:
分别与y轴,x轴交于点A,B,将直线
绕点A顺时针或逆时针旋转
得到
,请任选一种情况求
的函数表达式;
(3)如图4,在平面直角坐标系,点
,过点B作
轴于点A,作
轴于点C,P为线段
上的一个动点,点
位于第一象限.问点A,P,Q能否构成以点Q为直角顶点的等腰直角三角形,若能,请求出a的值;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b505788d3d02bf232ac637fc3a8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e72d26eae9a5470ac982541c609b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ce97f3b8512d0d0d2dfdd07df566dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/11/962f2b4d-ee48-4e34-960a-f665a77f0c17.png?resizew=523)
(1)如图2,在平面直角坐标系中,等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ade5f78adf77bf804517d008a4e98ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5562c94a46502fb52e8d0c45e98406c.png)
(2)如图3,在平面直角坐标系中,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d27c081879b6c6bc0abb0ceedb9d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b5062be5cf27ae8089ad0c25d1b7c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(3)如图4,在平面直角坐标系,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34899d07ba367114d24a41054bf9ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ea84cba8ccd585ad1da1fd204bc3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b45db8dd8768994af51206565379fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843f3ad7a1ce4848d9a1c14ca634b535.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,在平面直角坐标系中,直线
分别与x,y轴交于点A,B,抛物线
恰好经过这两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/c73f3fdf-c9c5-406d-aae4-f0e2d6ad0480.png?resizew=160)
(1)求此抛物线的解析式;
(2)若点C的坐标是
,将线段
绕着点C逆时针旋转
得到线段
.
①若点E在此抛物线上,求出m的值;
②若点P是y轴上的任一点,当
取最小值时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bb89aec41e32d27b5f0914c494dead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2299f88146e5a525b515a2ed36dfd1fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/c73f3fdf-c9c5-406d-aae4-f0e2d6ad0480.png?resizew=160)
(1)求此抛物线的解析式;
(2)若点C的坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d45c738904d7aea7b2aa9caa2aa315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①若点E在此抛物线上,求出m的值;
②若点P是y轴上的任一点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c813a22538427e3b4424e161b7e4d02.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图,抛物线
与
轴交于
两点,与
轴交于点
,且
,直线
与抛物线交于
、
两点,与
轴交于点
,点
是抛物线的顶点,设直线
上方抛物线上的动点
的横坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/a2d1c36d-e8e8-4e7b-8ea3-2b08d123cd6a.png?resizew=400)
(1)求该抛物线的解析式及顶点
的坐标;
(2)连接
、
,当
为何值时,
;
(3)在直线
上是否存在一点
使
为等腰直角三角形,若存在请直接写出点
的坐标,不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c43f704b5d150cb4e29e9796a07d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6541748f10d7ed5f755f456536dbc829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/a2d1c36d-e8e8-4e7b-8ea3-2b08d123cd6a.png?resizew=400)
(1)求该抛物线的解析式及顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b997232e251479b5be44bfec577c22.png)
(3)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d330ae90a71e2ff68e227f4dad4fa25c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】某社区广场有一块正方形花园
,其中
,E是
的中点.
(1)如图1,经过规划,需要修建两条小道
、
,M是
上一点,社区为节省修建时间和费用,要使得所修建的小道
的值最小,试求此时
的长和
的最小值
(2)如图2,社区广泛收集居民建议,重新设计了方案,修建四条小道
、
、
、
,其中M、N均在
上,且N在M的右边,
,要使得修建的小道
的值最小,试求此时
的长和
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d68ed01cac3a30c9321376d5190230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/12164b26-1785-437a-aa30-c56c3fd4b197.png?resizew=320)
(1)如图1,经过规划,需要修建两条小道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf7f5422a02aed24437295a01b11df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf7f5422a02aed24437295a01b11df0.png)
(2)如图2,社区广泛收集居民建议,重新设计了方案,修建四条小道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e643bd709da3969badf399cb16e0b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d443c1f801e90fe51fd288f2308e3a42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d443c1f801e90fe51fd288f2308e3a42.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
名校
【推荐2】在一次数学探究活动中,李老师设计了一份活动单:
“追梦”学习小组通过操作、观察、讨论后汇报:点A的位置不唯一,它在以BC为弦的圆弧上(点B、C除外),….小华同学画出了符合要求的一条圆弧(如图1).
(1)小华同学提出了下列问题,请你帮助解决.
①该弧所在圆的半径长为_______;
②△ABC面积的最大值为_______;
(2)经过比对发现,小明同学所画的角的顶点不在小华所画的圆弧上,而在如图1所示的弓形内部,我们记为A′,请你利用图1证明∠BA′C>30°.
(3)请你运用所学知识,结合以上活动经验,解决问题:如图2,已知矩形ABCD的边长AB=
,BC=5,点P在直线CD的左侧,且∠DPC=60°,求线段PB长的最小值为_______.
已知线段BC=2,使用作图工具作∠BAC=30°,尝试操作后思考: (1)这样的点A唯一吗? (2)点A的位置有什么特征?你有什么感悟? |
(1)小华同学提出了下列问题,请你帮助解决.
①该弧所在圆的半径长为_______;
②△ABC面积的最大值为_______;
(2)经过比对发现,小明同学所画的角的顶点不在小华所画的圆弧上,而在如图1所示的弓形内部,我们记为A′,请你利用图1证明∠BA′C>30°.
(3)请你运用所学知识,结合以上活动经验,解决问题:如图2,已知矩形ABCD的边长AB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/d511601c-5a89-4265-aeb5-5031f148b2c6.png?resizew=338)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】(1)问题提出:如图①,在矩形
中,
,
,
是
上一动点,则
的最小值为_________
(2)问题探究:如图②,在正方形
中,
,点
是平面上一点,且
,连接
,在
上方作正方形
,求
的最大值.
(3)问题解决:为迎接2021年9月在西安举办的第14届全运会,打造体育历史文化名城,某小区对一正方形区域
进行设计改造,方使大家锻炼运动.如图③,在正方形内设计等腰直角
为健身运动区域,直角顶点E设计在草坪区域扇形
的弧
上.设计铺设
和
这两条不同造价鹅卵石路,已知
米,
米,
,
,若铺设
路段造价为每米200元,铺设
路段的造价为每米100元,请求出铺设
和
两条路段的总费用的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.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/3318260948820af44fcfb598da6fb73d.png)
(2)问题探究:如图②,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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922b1e3f3948b044ff8f53af2aa1f038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(3)问题解决:为迎接2021年9月在西安举办的第14届全运会,打造体育历史文化名城,某小区对一正方形区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/babea91663e479b0018ebac5e36374d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4997da49b3dfe98144ad13aed0d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7612afc3724b3cf381556994bc1821f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33f381b03270154695d6b5421b1e739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0d6068866683547b733dbe005031a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/3635a6bd-bfab-4f1e-830c-e27d32c18771.png?resizew=582)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】综合与实践
问题情境:数学课上,老师提出如下问题:如图,四边形
是矩形,分别以
,
为边,在矩形
外侧作正方形
和
(点
,
,
在同一直线上,点
,
,
在同一直线上).连接
,取
的中点
,连接
.
求证:
,
.
(1)请你解答老师提出的问题.
数学思考:
(2)受到老师所提问题的启发,“兴趣小组”又提出了一个新问题:如图,若四边形
是平行四边形
,其余条件保持不变,则老师所提问题的结论是否保持不变?请你说明理由.
是菱形,分别以
,
为边,在菱形外侧作正方形
和
.连接
并延长,交
于点
.若
,
,求
的长.请你思考该问题,并直接写出结果.
问题情境:数学课上,老师提出如下问题:如图,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515f2668c6ab5e6d0679218ea9c8e4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b86380376b9f02763815b08e7a53147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed482dfedb2397d5e3a746b29b46bb0b.png)
(1)请你解答老师提出的问题.
数学思考:
(2)受到老师所提问题的启发,“兴趣小组”又提出了一个新问题:如图,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefc1020347754133cb9fcabbc05ebee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515f2668c6ab5e6d0679218ea9c8e4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fb581e6a89ae40731b8619fff1e173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fedcf7ab068506d99dc7546e151b48e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】【教材呈现】
在华师版八年级下册数学教材第111页学习了以下内容:菱形的对角线互相垂直.
【结论运用】
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/7cbfbed3-e5c7-419a-ab6b-d345d79040a8.png?resizew=368)
(1)如图①,菱形
的对角线
与
相交于点
,
,
,则菱形
的面积是 ;
(2)如图②,四边形
是平行四边形,点
在
上,四边形
是菱形,连接
、
、
,求证:
;
(3)如图③,四边形
是菱形,点
在
上,四边形
是菱形,连接
,若
,则
度.
在华师版八年级下册数学教材第111页学习了以下内容:菱形的对角线互相垂直.
【结论运用】
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/7cbfbed3-e5c7-419a-ab6b-d345d79040a8.png?resizew=368)
(1)如图①,菱形
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219e30b8ccb309425805df56f18af52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)如图②,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5787c784b686435a2073bdeb836307c.png)
(3)如图③,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d200b5fe60b56efb0d1139bbf6c4309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e218b2c53118f0fffac43fbde097f00e.png)
您最近一年使用:0次