如图,在平面直角坐标系中,直线
与
轴交于点
,与
轴交于点
,直线
与
轴交于点
,与
轴交于点
,两直线交于点
.
(1)求直线
的表达式;
(2)点
是直线
上的一个动点,若
,求点
的坐标;
(3)点
是
轴上一动点,当
是等腰三角形时,求点
的坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca0e79c861350d391b3a5a55086667c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0d82cb174d173b7e36937c3f99f591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3854bc6af67c7cb0595276d1abb54dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fae623bab5e3b8a26687c83887bc23c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/eac00a56-98ff-412b-ac84-b77d5c7552f1.png?resizew=539)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a929438dc04448cdd2a289c129a413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5498a21de00786d6f88ff98ad57f3b34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
更新时间:2023-12-15 13:14:21
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相似题推荐
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【推荐1】如图,平面直角坐标系中,直线y=﹣2x+4与x轴、y轴分别交于点B、A,点E在第一象限,坐标为(4,4).
![](https://img.xkw.com/dksih/QBM/2022/1/29/2904700105146368/2930350162698240/STEM/e250494d-e5b5-4f7c-ab45-acceacaa6c96.png?resizew=400)
(1)点A的坐标为 ,点B的坐标为 ;
(2)如图1,点P为x轴上一点,当A、B、P三点构成以AB为腰的等腰三角形时,请直接写出点P的坐标 ;
(3)如图2,连接AE、BE,在坐标系平面内,存在点D(D不与E重合),使以点A,B,D为顶点的三角形与△ABE全等,请你直接写出点D的坐标.
(4)如图3,连接AE、BE、OE,点Q为y轴上一点,∠OEB=∠QEA,直线EQ与直线AB交于点M,直接写出M点的坐标.
![](https://img.xkw.com/dksih/QBM/2022/1/29/2904700105146368/2930350162698240/STEM/e250494d-e5b5-4f7c-ab45-acceacaa6c96.png?resizew=400)
(1)点A的坐标为 ,点B的坐标为 ;
(2)如图1,点P为x轴上一点,当A、B、P三点构成以AB为腰的等腰三角形时,请直接写出点P的坐标 ;
(3)如图2,连接AE、BE,在坐标系平面内,存在点D(D不与E重合),使以点A,B,D为顶点的三角形与△ABE全等,请你直接写出点D的坐标.
(4)如图3,连接AE、BE、OE,点Q为y轴上一点,∠OEB=∠QEA,直线EQ与直线AB交于点M,直接写出M点的坐标.
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【推荐2】如图1,梯形
中,上底
,下底
,高
,梯形的面积
.
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146901332197376/3148362101760000/STEM/bea0620cba4e47cfacc06db71bf9b0d4.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146901332197376/3148362101760000/STEM/bb413fd0d38947f7b2adf843d8929d78.png?resizew=152)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146901332197376/3148362101760000/STEM/cbce540ce4b24d5d8785e0903649a39f.png?resizew=239)
(1)请根据
与
的关系式,补充表格中的数据:
(2)梯形的面积
与
的关系如图2所示,则点
表示的实际意义是__________________.
(3)若动点
从点
出发,沿
方向,以每秒1.5个单位长度的速度匀速运动,点
运动的时间为
,
的面积为
,
与
的关系如图3所示.求此时
的长和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4a7d7c2253a1686c61f8b8f3f6c6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b1927db96d84f27197b5a654b622f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73538c09794f3223540bfe074edff82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666da5bdfb67fb86ad7ba24adee8dc5c.png)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146901332197376/3148362101760000/STEM/bea0620cba4e47cfacc06db71bf9b0d4.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146901332197376/3148362101760000/STEM/bb413fd0d38947f7b2adf843d8929d78.png?resizew=152)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3146901332197376/3148362101760000/STEM/cbce540ce4b24d5d8785e0903649a39f.png?resizew=239)
(1)请根据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | 0 | 1 | __________________ |
![]() | __________________ | 68 | 72 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(3)若动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315c631a0924534a945af0bade30ca06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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【推荐1】如图1,在平面直角坐标系中,
沿直线
翻折得
,且
,
,点
在
轴负半轴上,
、
、
三点在同一条直线上,直线
交
轴于点
.
(1)求直线
的解析式;
(2)如图1,在线段
上有一动点
,连接
,
为
上一动点,
为
轴上一动点,连接
、
,当
时,求
的最小值;
(3)如图2,将
沿直线
平移得到
,若在平移过程中
是以
为一腰的等腰三角形,请直接写出点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ce5d6ca24e249f7172e51c154509b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a23e87d16c32b5aa4357f481b5808a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c95963e8e4dcc511f0d86b1853ddcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/3/89c45f45-72ee-44d5-bc64-bbdd57802206.png?resizew=350)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图1,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb1c5af4c7a9376882867e07690b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed2811f6c6d2514a2248cb706270b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e14e74535e98c0662724acd74809845.png)
(3)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74625390340982140e449e07663579a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95028c7c7fae098329550c4b3dcd6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ad711cd7db5bab7811c4c7057730b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926d2094777538ba6a70ea65d5061ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
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【推荐2】在平面直角坐标系xOy中,直线
与反比例函数
图象有两个交点A、B.
![](https://img.xkw.com/dksih/QBM/2022/11/26/3117970618302464/3121721933742080/STEM/943b9140507743b0aaf1e8a14ec6e81f.png?resizew=187)
(1)若点A的坐标为
,
①点B的坐标为______;
②不等式
的解集为______;
(2)若
,直接写出k的取值范围为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cca39b30b0b8e769293e13546b91f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/2022/11/26/3117970618302464/3121721933742080/STEM/943b9140507743b0aaf1e8a14ec6e81f.png?resizew=187)
(1)若点A的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
①点B的坐标为______;
②不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f07279a6b77aa3615af29ec9fc0523.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0668e2ee48a53a115ccae7a8fc4cf258.png)
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【推荐1】如图1,点
的坐标为
,点
为
轴正半轴上一个动点,将点
绕着点
顺时针旋转90°到
的位置.
![](https://img.xkw.com/dksih/QBM/2022/2/5/2909757728251904/2913952335577088/STEM/9ad01b25-e1e4-414a-ac58-139e07fd85b8.png?resizew=468)
(1)若点
的横坐标为:-2,求直线
的函数表达式;
(2)如图2,若
轴恰好平分
,
与
轴相交于点
,过点
作
于点
,试探究
与
的数量关系;
![](https://img.xkw.com/dksih/QBM/2022/2/5/2909757728251904/2913952335577088/STEM/82957dd1-dded-4b5e-bbff-a5f724cfc53c.png?resizew=363)
(3)如图3,将点
绕着点
逆时针旋转90°到点
,连接
,在点
的运动过程中,
与
轴相交于点
,则线段
的长度是否改变?若不变,求出
的长度,若改变,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2022/2/5/2909757728251904/2913952335577088/STEM/9ad01b25-e1e4-414a-ac58-139e07fd85b8.png?resizew=468)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dac702fe64edf1bc265da4b98cf2a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2022/2/5/2909757728251904/2913952335577088/STEM/82957dd1-dded-4b5e-bbff-a5f724cfc53c.png?resizew=363)
(3)如图3,将点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/2022/2/5/2909757728251904/2913952335577088/STEM/f1ca6ba9-29ac-4141-b3b6-30adc69b956b.png?resizew=318)
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【推荐2】如图,已知
,点P是
内一点,
,垂足为点C,
,
,A是
延长线上一点,连接
并延长与射线
交于点B.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/80015262-6679-4c57-855e-0d6806a1e3cc.png?resizew=168)
(1)当点P恰好是线段
的中点时,试判断
的形状,并说明理由;
(2)当
的长度为多少时,
是等腰三角形;
(3)设
,是否存在适当的k,使得
,若存在,试求出k的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895af4e7d44f5ef31ba3c3acba59029c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1830ad63b26620d7f45d5bd6e742b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2899e607479d8d1c47d954ae9ebb7144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63447ea996b9036a7a7ae726cc382cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/80015262-6679-4c57-855e-0d6806a1e3cc.png?resizew=168)
(1)当点P恰好是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18b1d68402a46fa3ecd3a9e8e4cfd69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551cc15c96651f88feba27a40e335c55.png)
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解答题-问答题
|
较难
(0.4)
【推荐3】如图1,在平面直角坐标系中,直线AB与x轴交于点A,与y轴交于点B,与直线OC:y=x交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/e5a1ea84-d58b-4dd4-9642-35f7c5999a4d.png?resizew=289)
(1)若直线AB解析式为y=﹣2x+12,求:
①求点C的坐标;
②求△OAC的面积.
(2)在(1)的条件下,若P是x轴上的一个动点,直接写出当△POC是等腰三角形时P的坐标.
(3)如图2,作∠AOC的平分线OF,若
,垂足为E,OA=4,P是线段AC上的动点,过点P作OC,OA的垂线,垂足分别为M,N,试问PM+PN的值是否变化,若不变,求出PM+PN的值;若变化,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/e5a1ea84-d58b-4dd4-9642-35f7c5999a4d.png?resizew=289)
(1)若直线AB解析式为y=﹣2x+12,求:
①求点C的坐标;
②求△OAC的面积.
(2)在(1)的条件下,若P是x轴上的一个动点,直接写出当△POC是等腰三角形时P的坐标.
(3)如图2,作∠AOC的平分线OF,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ebf992b3322f2d8b2ee986f67a6af6.png)
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