如图,
中,
,
,
,动点P从点B出发,在
边上以每秒
的速度向点A匀速运动,同时动点Q从点C出发,在
边上以每秒
的速度向点B匀速运动,运动时间为t秒
,连接
.
(1)若
与
相似,求t的值;
(2)连接
、
,若
,求t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/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a9eed64d225267a58cd001db67e2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c77f28566edddf4c3a8c15b3eee12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/18d63dbb-fb8a-48f0-a79c-68169c5a762f.png?resizew=223)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e36eaad3857bcaa452133b271c9cf56.png)
2015·山东潍坊·一模 查看更多[32]
2015届山东省潍坊市昌乐县中考一模数学试卷2016届浙江省台州市书生中学九年级上学期第三次月考数学试卷2017年江苏省徐州市鼓楼区树人中学中考数学一模试卷海南省定安县2018届九年级上学期期末考试数学试题人教版九年级下册 期中测试题沪科版九年级上册数学第22章 相似形 单元测试题2018年秋北师大版九年级数学上册期末测试卷(已下线)第22章 相似形2018-2019学年九年级上学期数学教材河南省实验中学2017-2018学年九年级上期中测试数学试题苏科版2019届九年级下册数学单元测试:第6章 图形的相似(1)河南省周口市商水县2018-2019学年九年级上学期期中数学试题河南省平顶山市宝丰县五校联考2018-2019学年九年级上学期期中数学试题江苏省连云港市赣榆区2019-2020学年九年级上学期期末数学试题湖南省株洲市株洲县2019-2020学年九年级上学期期中数学试题河南省洛阳市汝阳县2020-2021学年九年级上学期期末数学试题内蒙古自治区包头市昆都仑区包钢第三中学2021-2022学年九年级上学期10月月考数学试题辽宁省鞍山市岫岩满族自治县2021-2022学年九年级上学期期中数学试题陕西省咸阳市兴平市2021-2022学年九年级上学期期中数学试题江苏省盐城市滨海县第一初级中学教育集团2021-2022学年九年级上学期第二次限时独立作业数学试题江苏省连云港市赣榆汇文双语学校2021-2022学年九年级上学期第三次质量检测数学试题四川省成都市成都外国语学校2020-2021学年九年级上学期期中数学试题华东师大版九年级上学期数学期末模拟卷三(已下线)第21课 两个三角形相似的判定-【帮课堂】2022-2023学年九年级数学上册同步精品讲义(浙教版)湖南省益阳市安化县江南镇2022-2023学年九年级上学期数学多校联考试题卷山东省济宁市鱼台县2022-2023学年九年级上学期期末数学试题黑龙江省大庆市肇源县中心片2022-2023学年八年级下学期5月期中数学试题浙江省义乌市稠州中学2023-2024学年九年级上学期暑假独立作业检测数学试题安徽省合肥市50中学西校2022-2023学年九年级上学期月考数学试题宁夏回族自治区银川市第三中学治平校区2023-2024学年九年级上学期期中数学试题(已下线)江苏省泰州市姜堰区南苑学校2023-2024学年九年级上学期数学数学独立作业12月江苏省连云港市赣榆汇文双语学校2023-2024学年九年级上学期第三次质量检测数学试题河南省周口市沈丘县付井镇陈观中学2023-2024学年九年级上学期期末数学试题
更新时间:2023-11-22 09:51:12
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
,
,
于点E.
于点D.
![](https://img.xkw.com/dksih/QBM/2022/11/10/3106405009080320/3112350411259904/STEM/330b27e30a25403ca22bb2dee5c26f16.png?resizew=113)
(1)求证:
;
(2)连接
,若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b2cc1d0bfd22c88286880b9da1f6f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd5c41c921836b50f8e18abfdc5df3.png)
![](https://img.xkw.com/dksih/QBM/2022/11/10/3106405009080320/3112350411259904/STEM/330b27e30a25403ca22bb2dee5c26f16.png?resizew=113)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e57c76abca2467af86f45da0fec08cb.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
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【推荐2】已知:如图,∠C=∠1,∠2和∠D互余,BE⊥FD于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/ca39d885-0880-4607-8760-44936a5e05e1.png?resizew=201)
(1)填空:∠2和∠D可用关系式表示为______;∠1与∠D有怎样的关系式:______;
(2)求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/ca39d885-0880-4607-8760-44936a5e05e1.png?resizew=201)
(1)填空:∠2和∠D可用关系式表示为______;∠1与∠D有怎样的关系式:______;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
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【推荐1】如图,AB是
外接圆的直径,圆心为点O,点C,D是圆上两点,且
,连接CD交AB于点E.若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b997b0da1c9338e640206bfc0d0a427a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db6962f6d8c68e9ffb23862b119e6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e35a4368a93ffde747d30fa73d8a56.png)
![](https://img.xkw.com/dksih/QBM/2022/5/16/2980641185587200/2984392323850240/STEM/975bf8a6-fd8c-4183-942e-b2aaefa222c9.png?resizew=157)
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【推荐2】如图:P是正方形
的边
的中点,过B点作
于G,过C点作
于E,连接
,
.
(1)求证四边形
为平行四边形.
(2)若正方形
的边长为4,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f889668cdffbc1af33b53257c76804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4398a409532d9a2a7504f91c5be1b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/be35fea4-da2a-440c-a822-a4678cb0b7e9.png?resizew=139)
(1)求证四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6789371145ce9dfb0588e84ec0d45.png)
(2)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐1】在
中,
,
,
,点
在
所在的直线上运动,作
(
、
、
按逆时针方向).
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421354699407360/2421535214796800/STEM/a6f83ac8da67418f953080a9ccf39939.png?resizew=511)
(1)如图①,当点
在线段
上运动时,
交
于
.
①求证:
.
②当
是等腰三角形时,直接写出
的长.
(2)如图②,当点
在
的延长线上运动,
的反向延长线与
的延长线相交于点
,是否存在点
,使
是等腰三角形?若存在,写出点
的位置;若不存在,请简要说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90cabf329a7ab0d568509576b5838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3b58a4087b4a569572d93feceaec1b.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421354699407360/2421535214796800/STEM/a6f83ac8da67418f953080a9ccf39939.png?resizew=511)
(1)如图①,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9155d631c0413170e3b164c2212343f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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名校
【推荐2】如图,在矩形
中,
,
,点M是边
的中点,动点P从点A出发,沿折线
运动,在
上以每秒5个单位的速度运动,在
上以每秒4个单位的速度向终点D运动,连结
,Q是
的中点.点P的运动时间为
.
(1)用含t的代数式表示
的长;
(2)当点P在
上运动时,若
是直角三角形,求t的值;
(3)当
时,
取得最小值;
(4)当
与
的边平行或垂直时,直接写出t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06e2afda07968ab42d3a812cfdbbb01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60756bccb922a9478647372f42cd9d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9065265448704d5613107f1c0633d430.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/0a697028-3465-4b1c-8388-f1ef64738f4c.png?resizew=155)
(1)用含t的代数式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(2)当点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2b58424e893df4e01c912f87e09095.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/263b2e141214b976e320f5d3034dd308.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】在Rt△ABC中,∠C=90°,若sinA=
求cosA,sinB,tanB的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5756451881af4d6594c820652ebcc2a.png)
![](https://img.xkw.com/dksih/QBM/2019/3/7/2155240205533184/2156840560312320/STEM/8d27d6fb4aa74758bee70aee280cbc2c.png?resizew=85)
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真题
【推荐2】在等腰直角
中,
,
,D为直线
上任意一点,连接
.将线段
绕点D按顺时针方向旋转
得线段
,连接
.
(1)如图1,当点D在线段
上时,线段
与
的数量关系为________;
【类比探究】
(2)当点D在线段
的延长线上时,先在图2中补全图形,再探究线段
与
的数量关系并证明;
【联系拓广】
(3)若
,
,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(1)如图1,当点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【类比探究】
(2)当点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【联系拓广】
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdae10a1acf60f10c302a1b36524f216.png)
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