1 . 如图,在矩形
中,点E是
边上一点,四边形
是菱形,菱形的对角线
分别交
、
于P、Q两点,则下列结论中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c871e839-20cd-4766-a23b-f4cd07aa6474.png?resizew=333)
①
;②
;③
;④
.
![](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/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c871e839-20cd-4766-a23b-f4cd07aa6474.png?resizew=333)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2dc5aa7be74fd0e8e3c5319048f89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83ebdb0441a4181e60eca01f4cc086e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbfaa90c4eaf6d0f438b3bd2cd27580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46866c8c0ace60afffb99ca8171ea143.png)
A.①② | B.②③ | C.①④ | D.①③④ |
您最近一年使用:0次
2 . 如图,在▱
中,E是
上一点,且点E将
分为
(
)的两部分,连接
、
相交于F,则
是( )
![](https://img.xkw.com/dksih/QBM/2022/11/19/3113133893296128/3114545142882304/STEM/a1e0d69207404e73a2144d2b1bfc5c16.png?resizew=219)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/ff4806fb7f95f63e863c287faa51f8e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702a184b39a4763669ef7a4bcbb89c5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e88d06086fc0ff8d81e5454de2df.png)
![](https://img.xkw.com/dksih/QBM/2022/11/19/3113133893296128/3114545142882304/STEM/a1e0d69207404e73a2144d2b1bfc5c16.png?resizew=219)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 如图,四边形
为菱形,点E在AC的延长线上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/9a73c5ac-0310-4eaf-bf7a-eea182af6b94.png?resizew=135)
(1)求证:
;
(2)当
,
时,求AE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b20cbbe14eec779005ba4437a9e669.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/9a73c5ac-0310-4eaf-bf7a-eea182af6b94.png?resizew=135)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b33ad5bec002927253890450cfb41e6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
您最近一年使用:0次
2022-11-12更新
|
247次组卷
|
4卷引用:贵州省铜仁市石阡县2022-2023学年九年级上学期第三次质量监测数学试题
贵州省铜仁市石阡县2022-2023学年九年级上学期第三次质量监测数学试题广东省深圳市龙华区2022-2023学年九年级上学期期中考试数学试卷(已下线)2023年广东省佛山市中考一模数学试卷变式题16-20题湖南省娄底市涟源市2022-2023学年九年级上学期月考数学试题
4 . 如图,在平面直角坐标系中,已知
,
,点P从点O出发,沿
方向以2个单位长度/秒的速度运动,点Q从点B出发,沿
方向以1个单位长度/秒的速度运动,当点P到点A的位置时,两点停止运动.设运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/d31acb88-2354-4974-9faf-eca347bb1f05.png?resizew=182)
(1)当t为何值时,
的面积为9;
(2)当t为何值时,
与
相似.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6645b2aedfe89f041cee5f060c41aedb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cf4504a470005a2144556f02b56d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/d31acb88-2354-4974-9faf-eca347bb1f05.png?resizew=182)
(1)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
(2)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
2022-11-11更新
|
121次组卷
|
2卷引用:贵州省铜仁市碧江区第五中学2023-2024学年九年级上学期期中数学试题
5 . 如图,在平行四边形
中,以
为直径的
与
边的中点交于点
,与对角线
交于点
,作
,垂足为
.若
,则
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827beb23a9fe02a8b588645bcb82ce67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f5a1f6ceaa5c14147618525c8e3428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46da4c5a4b5156f8ea762553d8ed0d18.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/e0964ef9-1e6b-4d66-8d64-611da985786f.png?resizew=165)
您最近一年使用:0次
2022-11-05更新
|
129次组卷
|
2卷引用:贵州省铜仁市石阡县2022-2023学年九年级下学期第五次质量监测数学试题
名校
6 . 如图,已知E、F分别是△ABC中AB、AC边上的点,
,且AE:AB=3:5,那么
为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/d4f5b439-9df2-4e43-a5f0-55a3ee36cdf4.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9ebd85b8431300fd2d75b9c67cb356.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/d4f5b439-9df2-4e43-a5f0-55a3ee36cdf4.png?resizew=148)
A.3:5 | B.3:25 | C.9:25 | D.9:16 |
您最近一年使用:0次
2022-10-04更新
|
156次组卷
|
3卷引用:贵州省铜仁市碧江区铜仁学院附属中学2021-2022学年九年级上学期9月月考数学试题
贵州省铜仁市碧江区铜仁学院附属中学2021-2022学年九年级上学期9月月考数学试题(已下线)4.7 相似三角形的性质(分层练习)-2022-2023学年九年级数学上册同步精品课堂(北师大版)福建省惠安一中、惠安三中、崇武中学、黄塘中学2022-2023学年九年级上学期期中联考数学试题
7 . 【问题情境】如图1,在等腰直角三角形ABC中,∠ACB=90°,F是AC边上一动点(点F不与点A,C重合),以CF为边在△ABC外作正方形CDEF,连接AD,BF.
![](https://img.xkw.com/dksih/QBM/2022/10/2/3079017503129600/3079142894583808/STEM/91564499df92484c8938bddfbdcce5ae.png?resizew=453)
(1)【探究展示】①猜想:图1中,线段BF,AD的数量关系是 ,位置关系是 .
②如图2,将图1中的正方形CDEF绕点C顺时针旋转α,BF交AC于点H,交AD于点O,①中的结论是否仍然成立?请说明理由.
(2)【拓展延伸】如图3,将【问题情境】中的等腰直角三角形ABC改为直角三角形ABC,∠ACB=90°,正方形CDEF改为矩形CDEF,连接BF并延长,交AC于点H,交AD于点O,连接BD,AF.若AC=4,BC=3,CD=
,CF=1,求
的值.
![](https://img.xkw.com/dksih/QBM/2022/10/2/3079017503129600/3079142894583808/STEM/91564499df92484c8938bddfbdcce5ae.png?resizew=453)
(1)【探究展示】①猜想:图1中,线段BF,AD的数量关系是 ,位置关系是 .
②如图2,将图1中的正方形CDEF绕点C顺时针旋转α,BF交AC于点H,交AD于点O,①中的结论是否仍然成立?请说明理由.
(2)【拓展延伸】如图3,将【问题情境】中的等腰直角三角形ABC改为直角三角形ABC,∠ACB=90°,正方形CDEF改为矩形CDEF,连接BF并延长,交AC于点H,交AD于点O,连接BD,AF.若AC=4,BC=3,CD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c080849031f72fdc2bd0abf00d9cba32.png)
您最近一年使用:0次
2022-10-02更新
|
216次组卷
|
3卷引用:贵州省铜仁市德江县2022-2023学年九年级上学期期中数学试题
8 . 如图,已知E为平行四边形ABCD的DC边延长线上的一点,且CE=CD,连接AE分别交BC,BD于点F,G.
![](https://img.xkw.com/dksih/QBM/2022/9/8/3062089618268160/3074182852968448/STEM/cf33567368844f898d42af8952b1c3f4.png?resizew=132)
(1)求证:
AFB≌
EFC;
(2)若AE=12,求FG的长.
![](https://img.xkw.com/dksih/QBM/2022/9/8/3062089618268160/3074182852968448/STEM/cf33567368844f898d42af8952b1c3f4.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(2)若AE=12,求FG的长.
您最近一年使用:0次
9 . 如图,在平面直角坐标系xOy中,直线y=﹣x+m(m≠0)分别交x轴,y轴于A,B两点,已知点C(3,0).点P为线段OB的中点,连接PA,PC,若∠CPA=45°,则m的值是________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/ea57a454-0e23-47db-a0ef-74a1ec660f8d.png?resizew=181)
您最近一年使用:0次
名校
10 .
中,
,
,点
为直线
上一动点
点
不与
,
重合
,以
为边在
右侧作菱形
,使
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/57c69b52-779e-4094-bfd7-a72723d6c0c2.png?resizew=463)
(1)观察猜想:如图
,当点
在线段
上时,
与
的位置关系为:______.
,
,
之间的数量关系为:______;
(2)数学思考:如图
,当点
在线段
的延长线上时,结论
,
是否仍然成立?若成立,请给予证明;若不成立,请你写出正确结论再给予证明.
(3)拓展延伸:如图
,当点
在线段
的延长线上时,设
与
相交于点
,若已知
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.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/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/04582116cd765fcc5a52f44279ad6c94.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/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5deb742445686d17a88e979c95dacca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/57c69b52-779e-4094-bfd7-a72723d6c0c2.png?resizew=463)
(1)观察猜想:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/2c6c6e83c3df632e1e94fc8f0f529cd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50987e5e387450c63da0d6e528e873fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)数学思考:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
(3)拓展延伸:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
您最近一年使用:0次
2022-09-19更新
|
182次组卷
|
6卷引用:2023年贵州省铜仁市中考三模数学模拟试题