如图,四边形ABCD是边长为10的菱形,BE⊥AD于点E,AE=6,且BE交对角线AC于F,连接DF,点P是DC上一点,BP交AC于M.
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510269898334208/2511280151461888/STEM/530953e1-172a-4081-b16a-9df455a85dc9.png)
(1)求证:△ABF≌△ADF;
(2)如图1,若P为CD中点,求
的值;
(3)如图2,若S△BFM=S△CPM,求PC,并直接判断BP与CD是否垂直(不必说明理由).
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510269898334208/2511280151461888/STEM/530953e1-172a-4081-b16a-9df455a85dc9.png)
(1)求证:△ABF≌△ADF;
(2)如图1,若P为CD中点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7081090993015b5058f60ca45af968ae.png)
(3)如图2,若S△BFM=S△CPM,求PC,并直接判断BP与CD是否垂直(不必说明理由).
更新时间:2020-07-22 11:15:27
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相似题推荐
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【推荐1】综合与实践
数学模型可以用来解决一类问题,是数学应用的基本途径.通过探究图形的变化规律,再结合其他数学知识的内在联系,最终可以获得宝贵的数学经验,并将其运用到更广阔的数学天地.
(1)发现问题:如图1,在
和
中,
,
,
,连接
,
,延长
交
于点
.则
与
的数量关系:________,
________
;
(2)类比探究:如图2,在
和
中,
,
,
,连接
,
,延长
,
交于点
.请猜想
与
的数量关系及
的度数,并说明理由.
数学模型可以用来解决一类问题,是数学应用的基本途径.通过探究图形的变化规律,再结合其他数学知识的内在联系,最终可以获得宝贵的数学经验,并将其运用到更广阔的数学天地.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/f97cabda-aab3-4f32-8b41-a6dd78eab5fd.png?resizew=385)
(1)发现问题:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d0dd547921b8a35acf7b407fac21b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b5c0e0724cce5c25a88dca5e9220c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)类比探究:如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2ee144fbda9152177857f19d5aaede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
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【推荐2】在平面直角坐标系中,点A在x轴的负半轴上,点B在y轴的正半轴上,点A与点C关于y轴对称.
(2)如图2,AF平分∠BAC交BC于F,若AF=2OB,求∠ABC的度数;
(3)如图3,OA=OB,点G在BO的垂直平分线上,作∠GOH=45°交BA的延长线于H,连接GH,试探究OG与GH的数量和位置关系.
(2)如图2,AF平分∠BAC交BC于F,若AF=2OB,求∠ABC的度数;
(3)如图3,OA=OB,点G在BO的垂直平分线上,作∠GOH=45°交BA的延长线于H,连接GH,试探究OG与GH的数量和位置关系.
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【推荐1】如图,在
中,
,动点P从点B出发以秒1个单位长度的速度沿
向终点C运动(点P不与点B、C重合),以
为边在
上方作等腰
,使P为直角顶点,将
绕
的中点旋转
得到
,设四边形
与
重叠部分图形的面积为S,点P的运时间为t秒.
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937685984681984/2953380175740928/STEM/75a05126-9f6d-403c-a3b2-74a36139e590.png?resizew=217)
(1)点M到
的距离为_____.(用含t的式子表示)
(2)若线段
与
交于点E,当t为何值时,射线
将四边形
的面积分成
的两部分.
(3)当四边形
与
重叠部分为四边形时,求S与t的函数关系式.(不必求写出对应自变量取值范围)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a027fce94f578aa39259fbf69cba0457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee99b3dc075b1ead240c1ed858836a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71a79fb92a4337e8e54d94e85dd9354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e25a04aefe260f0beabc9c84c5cf22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937685984681984/2953380175740928/STEM/75a05126-9f6d-403c-a3b2-74a36139e590.png?resizew=217)
(1)点M到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e25a04aefe260f0beabc9c84c5cf22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5881f1ce9b4172ca346032d0fd1e3d.png)
(3)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e25a04aefe260f0beabc9c84c5cf22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】已知反比例函数y=
的图象经过点A(6,1).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/b2f11af6-fac7-4a4f-8490-42ea1a8fb17b.png?resizew=202)
(1)求该反比例函数的表达式;
(2)如图,在反比例函数y=
在第一象限的图象上点A的左侧取点C,过点A作x轴的垂线交x轴于点H,过点C作y轴的垂线CE,垂足为点E,交直线AH于点D.
①过点A、点C分别作y轴、x轴的垂线,两条垂线相交于点B,求证:O、B、D三点共线;
②若AC=2CO,求证:∠OCE=3∠CDO.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/b2f11af6-fac7-4a4f-8490-42ea1a8fb17b.png?resizew=202)
(1)求该反比例函数的表达式;
(2)如图,在反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
①过点A、点C分别作y轴、x轴的垂线,两条垂线相交于点B,求证:O、B、D三点共线;
②若AC=2CO,求证:∠OCE=3∠CDO.
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【推荐3】(1)数学张老师在数学活动课上出示了一道探究题:
如图,在
和
中,
,
,B,C,E三点在同一直线上,A,D两点在
同侧,若
,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/5da10a09-8dec-4d19-97f5-ee3272ef8f3b.png?resizew=123)
张老师分别从问题的条件和结论出发分析这道探究题:
①如图1,从条件出发:过A作
交
于M,过D作
交
于N,依据等腰三角形的性质“三线合一”分析
与
之间的关系,可证得结论;
②如图2,从结论出发:过D作
交
于P,依据三角形全等的判定,证明
,可证得结论;
请你运用其中一种方法,解决上述问题.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/ea08232f-5ac8-4776-a027-7d57c8b28ee8.png?resizew=286)
(2)小明同学经过对探究题及张老师分析方法的思考,提出以下问题:
如图3,在
中,
,在
中,
,B,C,E三点在同一直线上,A,D两点在
同侧,且A,D,E三点在同一直线上,若
,
,
的面积为7,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/91f1f89b-9a89-4389-a20e-8a241e45a97e.png?resizew=118)
(3)在小明同学的问题得到解决后,张老师针对之前的解题思路提出了下面问题:
如图4,在四边形
中,
,
,点E为
中点,连接
,若
,
,
,求
的长.
如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce25e95729c34d26e482512d36dd89b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dfa223e7b272346649538457c976864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/904a9c8e1e111a74eab5818919191ecb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/5da10a09-8dec-4d19-97f5-ee3272ef8f3b.png?resizew=123)
张老师分别从问题的条件和结论出发分析这道探究题:
①如图1,从条件出发:过A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7e284eac4b90bfb327de768a7beef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b9f8078689173b9588d16e4b65b9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
②如图2,从结论出发:过D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844230a06538f3da2f51d8a5cadca06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542f98377e2805f5cbf7b4bf40c1623f.png)
请你运用其中一种方法,解决上述问题.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/ea08232f-5ac8-4776-a027-7d57c8b28ee8.png?resizew=286)
(2)小明同学经过对探究题及张老师分析方法的思考,提出以下问题:
如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce25e95729c34d26e482512d36dd89b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65ed8e87249d3c5b9f30a89f5ded4a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0488d2f939ae98e8d4a51e37b91cc062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/91f1f89b-9a89-4389-a20e-8a241e45a97e.png?resizew=118)
(3)在小明同学的问题得到解决后,张老师针对之前的解题思路提出了下面问题:
如图4,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a755edadca4e4fc27fd49559b8d691ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59f5c3923354587bf3b08d0538af208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5b4ea605cf0b98e428d071f6be6762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf7c22116e6736e295d8d7eef9f5471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2961c2afded1adb0e7a77c65cba0a2e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/56d5f61b-f502-43c4-8a1b-b002660f10cc.png?resizew=187)
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【推荐1】如图1,在平面直角坐标系中,四边形AOBC为矩形,点A的坐标为(0,3),点B的坐标为(4,0),点E、F分别是BC边、AC边上的动点,均不与端点重合,连接EF,把△CEF沿着动直线EF翻折,得到△DEF.
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943141914550272/2964904073043968/STEM/66224588-d2de-45c9-946a-0ad453c38607.png?resizew=477)
(1)如图1,当点C的对应点D落在AB上,且EF∥AB时,则CE=___________;
(2)如图2,点G(0,2),连接FG交AB于点H,直线ED交AB于点I,当四边形FHIE为平行四边形时,
①证明:HF=BE ;
②求CE的长;
(3)当点E、F在问题(1)中的位置时,把△EDF绕点E逆时针旋转α度(0°<α<180°)得到△E D′F′,设直线D′F′与y轴、直线AB分别交于点N、M,当AN=AM时,直接写出AM的长.
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943141914550272/2964904073043968/STEM/66224588-d2de-45c9-946a-0ad453c38607.png?resizew=477)
(1)如图1,当点C的对应点D落在AB上,且EF∥AB时,则CE=___________;
(2)如图2,点G(0,2),连接FG交AB于点H,直线ED交AB于点I,当四边形FHIE为平行四边形时,
①证明:HF=BE ;
②求CE的长;
(3)当点E、F在问题(1)中的位置时,把△EDF绕点E逆时针旋转α度(0°<α<180°)得到△E D′F′,设直线D′F′与y轴、直线AB分别交于点N、M,当AN=AM时,直接写出AM的长.
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【推荐2】在平面直角坐标系中,抛物线y=ax2+bx﹣4经过点A(﹣8,0),对称轴是直线x=﹣3,点B是抛物线与y轴交点,点M、N同时从原点O出发,以每秒1个单位长度的速度分别沿x轴的负半轴、y的负半轴方向匀速运动,(当点N到达点B时,点M、N同时停止运动).过点M作x轴的垂线,交直线AB于点C,连接CN、MN,并作△CMN关于直线MC的对称图形,得到△CMD.设点N运动的时间为t秒,△CMD与△AOB重叠部分的面积为S.
(1)求抛物线的函数表达式;
(2)当0<t<2时,
①求S与t的函数关系式.
②直接写出当t=_____时,四边形CDMN为正方形.
(3)当点D落在边AB上时,过点C作直线EF交抛物线于点E,交x轴于点F,连接EB,当S△CBE:S△ACF=1:3时,直接写出点E的坐标为______.
(1)求抛物线的函数表达式;
(2)当0<t<2时,
①求S与t的函数关系式.
②直接写出当t=_____时,四边形CDMN为正方形.
(3)当点D落在边AB上时,过点C作直线EF交抛物线于点E,交x轴于点F,连接EB,当S△CBE:S△ACF=1:3时,直接写出点E的坐标为______.
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371027345178624/2371267141533696/STEM/2d4ee97ca233458daf21dd87a4daa8a1.png?resizew=373)
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解答题-问答题
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【推荐3】如图,在
中,∠ACB=90°,AC=3,BC=4,过点B作射线
.动点D从点A出发沿射线AC方向以每秒5个单位的速度运动,同时动点E从点C出发沿射线AC方向以每秒3个单位的速度运动.过点D作DH⊥AB于H,过点E作EF⊥AC交射线BB′于F,G是EF中点,连接DG.设点D运动的时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/026345fd-8eb2-444d-9d98-aeb3ac638d7e.png?resizew=146)
(1)当t为何值时,AD=AB,并求出此时DE的长度;
(2)当
与
相似时,求t的值;
(3)以DH所在直线为对称轴,线段AC经轴对称变换后的图形为
.当线段
与射线
,有公共点时,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9d71dc994689ae704bc96d650e1103.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/026345fd-8eb2-444d-9d98-aeb3ac638d7e.png?resizew=146)
(1)当t为何值时,AD=AB,并求出此时DE的长度;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d480e8b2c516612b47a19cb62d9bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
(3)以DH所在直线为对称轴,线段AC经轴对称变换后的图形为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
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