如图,
,
分别为
轴,
轴的正半轴上的点,作
关于坐标轴的对称线段
和
.
(1)如图(1),若
,
,直接写出点
,
的坐标;
(2)如图,
是
上一点,直线
交
于点
,
.
①如图(2),求证:
;
②如图(3),
平分
交
于点
,交
于点
,若四边形
的面积等于
面积的一半,判断
的形状,并证明你的结论.
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/12/677016df-c3c2-4dde-8759-e55b0da4c87b.png?resizew=400)
(1)如图(1),若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434845564fd5765244f8d1aa9240fa39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03f416cb4d50a5f473df4bbceeb3094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
①如图(2),求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37325793e54751bf28f15384606688d.png)
②如图(3),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f24a8190430bd48d182c911506e74da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2023-11-08 10:15:41
|
相似题推荐
解答题-计算题
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【推荐1】如图,在平面直角坐标系中,
的顶点均在网格格点上,且点A、B的坐标分别为
,
.
(1)在y轴的左侧以原点O为位似中心作
的位似图形
(点A、B的对应点分别为
)使
与
的相似比为2∶1;
(2)在(1)的条件下,计算
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50edfb9ed0d50d6f35ad6a130208d307.png)
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(1)在y轴的左侧以原点O为位似中心作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb99c20237aca8ff2ba640c28fbc5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741b8bc5f976c516ab79e9579ba18487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb99c20237aca8ff2ba640c28fbc5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
(2)在(1)的条件下,计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb99c20237aca8ff2ba640c28fbc5b2.png)
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【推荐2】如图,
在平面直角坐标系中,点
、
分别在
轴和
轴负半轴上,
,点
的坐标为
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](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/50bf7d7fa347c09dedde116bb787a3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/ffe43f40-6fcb-4495-95b5-4e963d8c0590.png?resizew=173)
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【推荐3】如图,在平面直角坐标系中,点A,B的坐标分别为(-2,0),(6,0),现同时将点A,B分别向上平移4个单位,再向右平移2个单位,分别得到点A,B的对应点C、D,连接AC、BD.
(1)求点C,D的坐标及四边形ABDC的面积S四边形ABDC
(2)在y轴上是否存在一点P,连接PA、PB,使S△PAB=S四边形ABDC,若存在这样一点,求出点P的坐标,若不存在,试说明理由.
(3)点P是线段BD上的一个动点,连接PC,PO,当点P在BD上移动时(不与B,D重合)给出下列结论:①
的值不变;②
的值不变,其中有且只有一个是正确的,请你找出这个结论并求其值.
(1)求点C,D的坐标及四边形ABDC的面积S四边形ABDC
(2)在y轴上是否存在一点P,连接PA、PB,使S△PAB=S四边形ABDC,若存在这样一点,求出点P的坐标,若不存在,试说明理由.
(3)点P是线段BD上的一个动点,连接PC,PO,当点P在BD上移动时(不与B,D重合)给出下列结论:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211bbbcbe8fb843166d3f3781bbfac96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75b40336e9829f7a8c89df4e1ea62a9.png)
![](https://img.xkw.com/dksih/QBM/2019/4/30/2193463320035328/2194407794450432/STEM/e0d076c4-a0ab-4ff6-aa0e-1b36452e6f26.png?resizew=338)
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【推荐1】如图,在矩形中,
、
分别是边
、
上的点,且
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a56cc80af108e5dbcc6509b3d9d3b4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b4da8d254b7d76b7615d7f7cd824a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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【推荐2】如图,△ABC中,AB=AC=2,∠B=40°.点D在线段BC上运动(点D不与B,C重合),连接AD,作∠ADE=40°,DE交线段AC于E.
![](https://img.xkw.com/dksih/QBM/2019/2/8/2136056085454848/2137949366566912/STEM/b42ffd023f0e4292bc35ddeda22e7ee8.png?resizew=181)
(1)当∠BAD=20°时,∠EDC=______°;
(2)当DC等于多少时,△ABD≌△DCE?并说明理由;
(3)在点D的运动过程中,△ADE的形状也在改变,判断当∠BAD等于多少度时,△ADE是等腰三角形.
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(1)当∠BAD=20°时,∠EDC=______°;
(2)当DC等于多少时,△ABD≌△DCE?并说明理由;
(3)在点D的运动过程中,△ADE的形状也在改变,判断当∠BAD等于多少度时,△ADE是等腰三角形.
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【推荐1】如图①,在一张长方形纸片
上画一条线段
,将纸片沿线段
折叠(如图②),当
时,试问重叠部分的
是什么三角形,请说明理由(注:长方形纸片对边平行,即:
)\
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e4f9a9fd59ac8fde1cd5e456003e10.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/0a484b26-1df9-4074-b64d-9c72daa1ad0a.png?resizew=350)
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【推荐2】阅读材料:若
,求m,n的值.
解:
,
,
,
,
,
.
根据你的观察,探究下面的问题:
(1)
,则
_______,
_______;
(2)已知
的三边长a 、b 、c都是正整数,且满足
,求
的周长.
(3)已知a、b、c分别是
三边的长且
,请判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb8f369a7ed1f07251c99f7da23e4ae.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d89637e7c2919a81748dd3545d4787e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6363098a9b5867e4ca5812287a60b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b390103b0f2670f7ed2b18494df684d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7724669f7570a8dd2bf16c4a2ab15448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7173edb9edfe680dc8d7cb89f9ec81c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
根据你的观察,探究下面的问题:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e484f17a102f70d6d07ea250e71cd39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245fae04a922207acef2bd7a24cf0dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)已知a、b、c分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25b992d886adcc49bee86a62f878609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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