如图1,在平面直角坐标系中,点A(a,0)、点B(b,0)为x轴上两点,点C在y轴的正半轴上,且a,b满足等式
.
![](https://img.xkw.com/dksih/QBM/2022/2/28/2926199221288960/2931052886777856/STEM/95ea1474-a49d-4d85-92ed-0c73de18a5c7.png?resizew=416)
(1)
________;
(2)如图2,若M,N是OC上的点,且
,延长BN交AC于P,判断△APN的形状并说明理由;
(3)如图3,若
,点D为线段BC上的动点(不与B,C重合),过点D作
于E,BG平分∠ABC交线段DE于点G,连AD,F为AD的中点,连接CG,CF,FG.试说明,CG与FG的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f555c4049d6aa23c9a34cf950e10e60.png)
![](https://img.xkw.com/dksih/QBM/2022/2/28/2926199221288960/2931052886777856/STEM/95ea1474-a49d-4d85-92ed-0c73de18a5c7.png?resizew=416)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
(2)如图2,若M,N是OC上的点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29acf2e72efffef3c6297b355fdae34c.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
更新时间:2022-03-07 13:05:16
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相似题推荐
解答题-证明题
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【推荐1】平面直角坐标系中,点
,
,且
、
满足:
,点A、C关于y轴对称,点F为x轴上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/48417829-3319-427a-ae29-325bcc9ed8e6.png?resizew=454)
(1)求点A、B两点的坐标;
(2)如图1,若
,
,且
,连接
交x轴于点
,求证:
;
(3)如图2,若
,且
,直线BC上存在某点
,使
为等腰直角三角形(点D、F、G按逆时针方向排列),请直接写出点F的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63284302e0fe4ee58726b36dd313326.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/48417829-3319-427a-ae29-325bcc9ed8e6.png?resizew=454)
(1)求点A、B两点的坐标;
(2)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8ba7544081906738bac9fc1541c514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fab40f323d2963eb0c4cdf39018fef.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c30a8564ab47bc5c8c3341a46a77ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029ad83f1a3262048cba0e650b63e929.png)
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【推荐2】如图,在平面直角坐标系中,A(O,x),B(3,y),且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/39114e97-3888-4fe0-a05d-7b94477bfaa9.png?resizew=635)
(1)求点A,B的坐标;
(2)点Q(m,n)为直线AB上一动点(点Q异于A、B两点),在(1)的条件下,满足
,求m的取值范围;
(3)已知C(0,c),D(d,0),a,b均为非负数,且满足
,
,
,F为第三象限内一点,连接CF交x轴于点E,AE=5,OE=3;过点F作FM⊥BD于点M,FN⊥AE于点N.求FM-FN的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7a75f33c175c36213750ce01794f28.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/39114e97-3888-4fe0-a05d-7b94477bfaa9.png?resizew=635)
(1)求点A,B的坐标;
(2)点Q(m,n)为直线AB上一动点(点Q异于A、B两点),在(1)的条件下,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e3f62a6afcc3d5c943406e776e5fb6.png)
(3)已知C(0,c),D(d,0),a,b均为非负数,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9cd61db48e1b2adbdcba8873c7873c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6604c4074df0ac389a791d0c172ac0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889387e415f9e2c43c6b4faba8dbb874.png)
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【推荐1】(1)如图1.在Rt△ACB中,∠ACB=90°,AC=8,BC=6,点D、E分别在边CA,CB上且CD=3,CE=4,连接AE,BD,F为AE的中点,连接CF交BD于点G,则线段CG所在直线与线段BD所在直线的位置关系是 .(提示:延长CF到点M,使FM=CF,连接AM)
![](https://img.xkw.com/dksih/QBM/2021/3/12/2676054967795712/2677213441163264/STEM/afd7066d-376a-4ec9-8883-1074db8d2224.png?resizew=165)
![](https://img.xkw.com/dksih/QBM/2021/3/12/2676054967795712/2677213441163264/STEM/d3e784a5-6c73-4f8d-9d0f-543813411cef.png?resizew=174)
(2)将△DCE绕点C逆时针旋转至图2所示位置时,(1)中的结论是否仍然成立?若成立,请给出证明;若不成立,请说明理由.
(3)将△DCE绕点C逆时针在平面内旋转,在旋转过程中,当B,D,E三点在同一条直线上时,CF的长为 .
![](https://img.xkw.com/dksih/QBM/2021/3/12/2676054967795712/2677213441163264/STEM/afd7066d-376a-4ec9-8883-1074db8d2224.png?resizew=165)
![](https://img.xkw.com/dksih/QBM/2021/3/12/2676054967795712/2677213441163264/STEM/d3e784a5-6c73-4f8d-9d0f-543813411cef.png?resizew=174)
(2)将△DCE绕点C逆时针旋转至图2所示位置时,(1)中的结论是否仍然成立?若成立,请给出证明;若不成立,请说明理由.
(3)将△DCE绕点C逆时针在平面内旋转,在旋转过程中,当B,D,E三点在同一条直线上时,CF的长为 .
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【推荐2】如图1,已知直线
与
轴,
轴分别交于A,B两点,过点B在第二象限内作
且
,连接
.
(1)求点C的坐标.
(2)如图2,过点C作直线
轴交AB于点D,交
轴于点E,
请从下列A,B两题中任选一题作答,我选择______题
A.①求线段CD的长.
②在坐标平面内,是否存在点M(除点B外),使得以点M,C,D为顶点的三角形与
全等?若存在,请直接写出所有符合条件的点M的坐标:若不存在,请说明理由.
B.①如图3,在图2的基础上,过点D作
于点F,求线段DF的长.
②在坐标平面内,是否存在点M(除点F外),使得以点M,C,D为顶点的三角形与
全等?若存在,请直接写出所有符合条件的点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179856a0add9d62f5f25cdc576d74b02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be86349e06431647f8e359d9bd07700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(1)求点C的坐标.
(2)如图2,过点C作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796ea3826380a16db89e806a41d10430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
请从下列A,B两题中任选一题作答,我选择______题
A.①求线段CD的长.
②在坐标平面内,是否存在点M(除点B外),使得以点M,C,D为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
B.①如图3,在图2的基础上,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
②在坐标平面内,是否存在点M(除点F外),使得以点M,C,D为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e9b8a991d00fdd2810dda7adc54fd8.png)
![](https://img.xkw.com/dksih/QBM/2019/11/28/2343646901387264/2344333309820928/STEM/ad448529b40b495daa285622a74f6dd7.png?resizew=378)
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【推荐1】综合与实践
问题情境:
在矩形
中,对角线
、
交于点O,
交
于点E,连接
,F是
的中点.
探究发现:
(1)如图1,直接写出
和
的数量关系:______;
(2)探究拓展:勤奋小组的同学们在射线
上任取一点P,将射线
绕点O逆时针旋转得射线
,使
,与射线
交与点Q.在如图2中,猜想并证明线段
与线段
之间的数量关系.
(3)探究拓广:在(2)的条件下,若
,
,当
时,直接写出
的长度.
问题情境:
在矩形
![](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/5b836a0f9c491f85767e8f6695576fd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
探究发现:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/b677263e-0793-4c2b-8dae-85e6002dfec8.png?resizew=721)
(1)如图1,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb97bee68fc0d7d317d977e54aa4cff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(2)探究拓展:勤奋小组的同学们在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a95e9ce8cfc711b353c7cfa1dda6ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
(3)探究拓广:在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fead1d0be9e87ad62779b31fd6f88986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
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解题方法
【推荐2】如图1,等腰△ABC中,AB=AC,D为AB上一点,等腰△CDE,CD=DE,∠BAC=∠EDC,DE交BC于点M,连接BE.
(1)如图1,若∠BAC=30°,AC=3,AD
,求DE的长度;
(2)如图2.若DM⊥BC求证:2MB+EB=BC.
(3)如图3,∠A=30°,AC∥DE,CN⊥AB,EF⊥CE,延长DB至点H,使得DH=DE,试判断FM与FN的数量关系,并写出证明过程.
(1)如图1,若∠BAC=30°,AC=3,AD
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5474039e1b68c8614b61b94ed5f4d7ac.png)
(2)如图2.若DM⊥BC求证:2MB+EB=BC.
(3)如图3,∠A=30°,AC∥DE,CN⊥AB,EF⊥CE,延长DB至点H,使得DH=DE,试判断FM与FN的数量关系,并写出证明过程.
![](https://img.xkw.com/dksih/QBM/2021/9/8/2803784814329856/2811245972070400/STEM/373e16cd-0fb6-4cdf-be21-977c7a907844.png)
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解题方法
【推荐1】如图1,四边形
中,
在直线
上,
,以
为直径作
,恰好经过
两点.
(1)若
,则
______;
(2)求
的度数;
(3)当点
在边
上,且
时,求
的值;
(4)如图2,作
关于
的对称点
,当
是等腰三角形时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60e8b8f8bea945d229408c148c0617d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2507785390443a33eadc3b52b09cdbb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663aa29cf0f19e37809eb6ea70c4e767.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/18cde107-dd42-4e67-a7d5-18544ba44972.png?resizew=308)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f76e37d6e6b182896ccaaa187cfe07.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8376cf9afd3c5686f4bd0debede45301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a205a7eab74e544c9e5635f1ef9e9702.png)
(4)如图2,作
![](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/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f1ca1a6bb305f29dbc9d2b3354de66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4465b5971b4a15886bcd69eef74d0700.png)
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【推荐2】在
中,
,
,点
是射线
上一动点,连接
,将
绕点
逆时针旋转
得
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/c8dea986-6b16-4f5c-abd4-0b84963e9697.png?resizew=635)
(1)如图1,当点
在线段
上时,若
,求
的周长;
(2)如图2,点
在
延长线上,作点
关于
边的对称点
,连接
,
,将
绕点
顺时针旋转
得
,连接
,求证:
;
(3)如图3,在第(2)问的情况下,延长
交
于
,连接
,当
时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9332278351ab92e03e984e9279dd06a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/c8dea986-6b16-4f5c-abd4-0b84963e9697.png?resizew=635)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91876779b8d9fc9680275dabe6dbfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76956e451ab7fd18f473503c3745187d.png)
(3)如图3,在第(2)问的情况下,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca14f6100d829f197a5dac5197bbe0b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0b6eaea0c7f07d115c65d7450d133e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4be879623dd0e50ffa9090edfcd9c96.png)
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