【感知】如图①,在四边形ABCD中,点P在边AB上(点P不与点A、B重合),
.易证
.(不需要证明)
【探究】如图②,在四边形ABCD中,点P在边AB上(点P不与点A、B重合),
.若
,
,
,求AP的长.
【拓展】如图③,在
中,
,
,点P在边AB上(点P不与点A、B重合),连结CP,作
,PE与边BC交于点E,当
是等腰三角形时,直接写出AP的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8e63c767b1a19f79285d123c080211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da939101cd9f0aa996134cb256d414fc.png)
【探究】如图②,在四边形ABCD中,点P在边AB上(点P不与点A、B重合),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e7fea3b9599d8021cc551f8d93e524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fc6a5e71fa379d613ac1ef1cdf1048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1033807076d59d5b26e1a07536688b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
【拓展】如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46de792a9388bc13e70dc28eeab60405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f9b23edebed6f00741022b69727de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef0db813a64ec6caa9373413dbf822d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/e0042374-9194-4df3-9289-908d3d048482.png?resizew=530)
21-22九年级上·吉林长春·期末 查看更多[4]
吉林省长春市绿园区2021-2022学年九年级上学期期末考试数学试题(已下线)第14讲 相似三角形中的“一线三等角”模型-【多题一解&一题多解】冲刺2023年中考数学满分应对方法与策略(全国通用)内蒙古自治区赤峰市红山区赤峰实验中学2022-2023学年九年级下学期3月月考数学试题(已下线)第4章 图形的相似全章复习攻略与检测卷(3个概念2个性质1个判定1个作图1个应用2种思想)-【帮课堂】2023-2024学年九年级数学上册同步学与练(北师大版)
更新时间:2022-01-02 17:30:23
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如下几个图形是五角星和它的变形.
![](https://img.xkw.com/dksih/QBM/2019/7/20/2251160541069312/2283938161180672/STEM/4f96e3f9cef44508af145bf1fed5b1bb.png?resizew=490)
(1)图甲是一个五角星 ABCDE,则∠A+∠B+∠C+∠D+∠E 的度数为 ;(不必 写过程)
(2)如图乙,如果点 B 向右移动到 AC 上时,则∠A+∠EBD+∠C+∠D+∠E 度数为 ;(不必写过程)
(3)如图丙,点 B 向右移动到 AC 的另一侧时,(1)的结论成立吗?为什么?
(4)如图丁,点 B,E 移动到∠CAD 的内部时,结论又如何?(不必写过程)
![](https://img.xkw.com/dksih/QBM/2019/7/20/2251160541069312/2283938161180672/STEM/4f96e3f9cef44508af145bf1fed5b1bb.png?resizew=490)
(1)图甲是一个五角星 ABCDE,则∠A+∠B+∠C+∠D+∠E 的度数为 ;(不必 写过程)
(2)如图乙,如果点 B 向右移动到 AC 上时,则∠A+∠EBD+∠C+∠D+∠E 度数为 ;(不必写过程)
(3)如图丙,点 B 向右移动到 AC 的另一侧时,(1)的结论成立吗?为什么?
(4)如图丁,点 B,E 移动到∠CAD 的内部时,结论又如何?(不必写过程)
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解答题-计算题
|
适中
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【推荐2】在
中,
,
,点
,
分别是
边
,
上的点,点
是一动点,设
,
,
.
(1)若点
在边
上,如图
,
,计算
的度数;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/a7d89e0d-002c-4da7-9a41-d6f746188e91.png?resizew=159)
(2)若点
运动到
外,请在图
中标出
,
,
,探究
,
,
之间的等量关系,并说明理由;
(3)若点
运动到
外,请分别在图
,图
中标出
,
,
,并直接写出相应的
,
,
之间的等量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9666188e21ea5c4b24d5248e87dc7463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4626c693586583b09c3008f1d81a76a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed950393134a73bdc211151fcb847f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9fee24411b5428706da6fac627cad6.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72af7e31f7898444c65c63e4611216bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4678ff1b3ea3bd09ed3494a0efe31c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/a7d89e0d-002c-4da7-9a41-d6f746188e91.png?resizew=159)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/f46f3ef5-3885-4148-8aa1-a101ba783256.png?resizew=159)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/4f0cf20a-abe8-46cd-88fe-1caef0ed225d.png?resizew=338)
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适中
(0.65)
【推荐1】如图,在某监测点
处望见一艘正在作业的渔船在南偏西
方向的
处,若渔船沿北偏西
方向以60海里/小时的速度航行,航行半小时后到达
处,在
处观测到
在
的北偏东
方向上,求
、
之间的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.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/editorImg/2022/12/24/85c3cbe6-60ce-406e-a4a6-eb320b2b4e6f.png?resizew=142)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图1,
中,
,
,点
、
别在边
、
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/4b09c508-614b-45c6-b8cf-1fda4fe66f18.png?resizew=295)
(1)求证:
;
(2)如图2,绕点
旋转
,使其一边
落在线段
上,连接
、
并延长相交于
点.求
的度数;
(3)在(2)的条件下,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852460ad317a315b565b7364347656fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/4b09c508-614b-45c6-b8cf-1fda4fe66f18.png?resizew=295)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
(2)如图2,绕点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7890f747854b8fcf25dcff1991fb84.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ea8be9535f942121f6f6d873d03272.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图1,
中,
,
,
为
边上一点,
,且
,连接
,
与
交于点
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694606074052608/2700896634183680/STEM/01bc02fd-0296-427e-a0d0-43fef98bac80.png?resizew=445)
(1)求证:
;
(2)求
的长;
(3)如图2,
为
延长线上一点,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10d461a7c0b86a2f09c2ea17f38260e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/b8b1472e121da0ae5550329cfda5f0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694606074052608/2700896634183680/STEM/01bc02fd-0296-427e-a0d0-43fef98bac80.png?resizew=445)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4760b2ea8943686bf14817f8c887926e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77032c22fda90484c0a996bb3c7eae0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8341f0466c9665170980938265dc67.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,Rt△ABC中,∠B=90°,点D为AC上一点,以CD为直径的⊙O交AB于点E,连接CE,CE平分∠ACB.
(1)求证:AE是⊙O的切线;
(2)若CE=2
,BE=2.求⊙O的半径.
(1)求证:AE是⊙O的切线;
(2)若CE=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2021/4/24/2706919117627392/2716082586951680/STEM/965da320-9ce3-4baf-abb5-ed5af601342c.png)
您最近一年使用:0次