名校
1 . 如图,在
中,C、D为
边上的两个动点,
.
(1)若
,则
与
相似吗?为什么?
(2)若
(即C、D重合),则
_______°时,
;
(3)当
和
满足怎样的数量关系时,
?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/8b2bbecc-a921-4f09-9345-7192a2219b89.png?resizew=191)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637e8940f85da9c0442bb4c80ef3ddcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e4b16c2c6c9bd089da78122e9d2511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a84b7de4bcbaa36f542b7ac3886bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61448f40fc2b80976beb507340d8dc28.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd601617f0ab200d5c80c37ab41d7323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61448f40fc2b80976beb507340d8dc28.png)
您最近一年使用:0次
2023-03-06更新
|
225次组卷
|
6卷引用:江苏省徐州市(各县)2022-2023学年九年级上学期期末数学试题
江苏省徐州市(各县)2022-2023学年九年级上学期期末数学试题河南省郑州实验外国语2023-2024学年九年级上学期开学考试数学试题安徽省六安市皋城中学2023-2024学年九年级上学期月考数学试题河北省邢台市襄都区2023-2024学年九年级上学期期中数学试题(已下线)专题03 图形的相似(十大类型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)(已下线)专题04相似三角形的性质与判定(八大类型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)
名校
2 . 【初步探索】
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/c6f6d6d2-cacb-495a-baf6-ed6c038f21ea.png?resizew=667)
(1)如图1,已知点
在直线
上,点
,
在直线
的同侧,
,
,
,求证:
;
【问题解决】在【初步探索】的基础上,将
绕点
顺时针旋转
,直线
,
交于点
,如图2所示.
(2)当
的面积达到最大时,
的度数为__________
(3)根据图2,求证:
;
(4)根据图2,求
的度数;
【类比应用】
(5)如图3,在矩形
和矩形
中,
,
,
,连接
,
,请直接 写出
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/c6f6d6d2-cacb-495a-baf6-ed6c038f21ea.png?resizew=667)
(1)如图1,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0487ebca22d4aa1233073f81fd70a424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3762962f916a4e948fa9c8c4910d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba2a4b4ce20e79784423ac1290986f8.png)
【问题解决】在【初步探索】的基础上,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a77976e64b2039b4268500f503e9f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)根据图2,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2bc6632ebf2ffa5b6554fd54be46fe.png)
(4)根据图2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
【类比应用】
(5)如图3,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff55472c24a0d15af9965a7e906f7bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5383ff62f7047721e61397694588a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844912df3dedd9403e152d540fb3fbc9.png)
您最近一年使用:0次
2023-03-02更新
|
138次组卷
|
3卷引用:河北省保定市雄县2022-2023学年九年级上学期期末考试数学试题
3 . 如图,圆O的直径
与弦
相交于点
,直线
与
相交于点
,连结
.
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/f8118f56-0568-42f1-a6e4-35e665c96fb5.png?resizew=147)
(1)求证:
;
(2)过
作直线
交圆O于
,垂足为
.若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71bcc312a46e8ee7b9e34d90315f7e0.png)
.求弦
的长;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/f8118f56-0568-42f1-a6e4-35e665c96fb5.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a0cee69d15d3f94afa555259ead3b.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af121037d2bf682c1088d87fb1e876bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71bcc312a46e8ee7b9e34d90315f7e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
您最近一年使用:0次
名校
4 . 如图,
的顶点均为网格中的格点.
,使
(相似比不为1).
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e685cffae41a4f4c752efd79fb0c3af.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e685cffae41a4f4c752efd79fb0c3af.png)
您最近一年使用:0次
2023-02-11更新
|
164次组卷
|
2卷引用:浙江省杭州市十三中教育集团(总校)2022-2023学年九年级上学期期末数学试题
5 . 如图,等腰
与等腰
全等,
分别交
于点D、E,请在图中找出一对相似而不全等的三角形并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f036919c810e8cc423262426d7e8b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5a35bfed6489bf9c27aa7328374cfb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/205eb21e-6e3a-436b-bc9a-5114e4a6e106.png?resizew=181)
您最近一年使用:0次
6 . 【问题情境】
在综合与实践课上,同学们以“
纸片的折叠”为主题开展数学活动.如图①,在矩形
纸片
中,
长为
,
长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/5410cc95-ad27-4461-b3f8-3a860fe5f4aa.png?resizew=123)
【操作发现】
第一步:如图②,将矩形纸片
对折,使
与
重合,得到折痕
,再将纸片展平,则
______
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/21d66b62-713e-4505-b786-88dd3d0bd330.png?resizew=115)
第二步:如图③,将矩形纸片
沿
折叠,使点
的对应点
落在矩形
的内部,再将纸片沿过点
的直线折叠,使
与
重合,折痕为
,则
______度.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/7caf96ed-8474-4e64-ac5a-59631448dcbd.png?resizew=109)
【结论应用】
在图③中,运用以上操作所得结论,解答下列问题:
(1)求证:
.
(2)直接写出线段
的长为______
.
在综合与实践课上,同学们以“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b553e2a281714677e29a5e97dd7d5a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b553e2a281714677e29a5e97dd7d5a3.png)
![](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/a2a835d77c364303ea59d96e6ce42a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/5410cc95-ad27-4461-b3f8-3a860fe5f4aa.png?resizew=123)
【操作发现】
第一步:如图②,将矩形纸片
![](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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/21d66b62-713e-4505-b786-88dd3d0bd330.png?resizew=115)
第二步:如图③,将矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b868dac191e29407c8b629c5c197b0d2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/7caf96ed-8474-4e64-ac5a-59631448dcbd.png?resizew=109)
【结论应用】
在图③中,运用以上操作所得结论,解答下列问题:
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a963b18b9247ba5b993332c37d6494.png)
(2)直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
您最近一年使用:0次
2023-02-01更新
|
199次组卷
|
2卷引用:甘肃省兰州市安宁区兰州交通大学附属中学2022-2023学年九年级上学期期中数学试题
7 . 动感单车是一种新型的运动器械,是经过科学地实验设计,它不仅不劳损腰部,还能使得健身达到最大的效果.图①是一辆动感单车的实物图,图②是它的侧面示意图,
为主车架,
为调节管,点
,
,
在一条直线上,其中
,
,点
在线段
上,
的延长线与
交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/1a82ae04-0b7f-4ee3-a35e-83a17babcce5.png?resizew=345)
(1)求证:
.
(2)已知
的长为
,
,当
的长度调节至
时,求点
到
的距离(参考数据:
,
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43defd54316aac92a3d18d4d400033c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55cb039ee38520b9a2dae02000a8303c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e66b12019cdf68327d34c90dff7c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea2a3bbc146563f5a9aab5299d6b4ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/1a82ae04-0b7f-4ee3-a35e-83a17babcce5.png?resizew=345)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddab23d6d19e6d141560eacaae45ad9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a770f2b3451313d24143dc555646d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c03c24190c823ad588ff903cc85c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b9da385bd721f9341ad900abf0b6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f1f3b8fbd57bbf30f4547571bb833d.png)
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3卷引用:河南省周口市郸城县光明学校2022-2023学年九年级上学期期中数学试题
河南省周口市郸城县光明学校2022-2023学年九年级上学期期中数学试题(已下线)2023年河南省驻马店市八校联考中考二模数学试题变式题16-20题山西省某地市2022-2023学年九年级上学期月考数学试题C卷
2023九年级下·江苏·专题练习
8 . 已知二次函数
的图象与
轴分别交于A、
两点(点A在点
的左边),以
为直径作
,
与
轴正半轴交于
,点
为劣弧
上一动点,连接
、
两弦相交于点
,连接
,
.
(1)求点
的坐标;
(2)若
的半径为3时,求
的值;
(3)请探索当点
运动到什么位置时,使得
与
相似,并给予证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86667ae8cc7f37366f0c539cb189692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)请探索当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
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9 . 下列结论正确的是( )
A.所有直角三角形都相似 |
B.平分弦的直径垂直弦且平分弦所对的弧 |
C.同弧所对的圆周角相等 |
D.当![]() ![]() |
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10 . 如图,
中,
分别为
上的点,
,将
绕点A逆时针旋转,连接
,且
三点恰好在一条直线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/dd9be411-1013-42ce-863e-5e0cbf3d0dd7.png?resizew=344)
(1)如图①,连接
,求证:
;
(2)如图②,若
为直角三角形,
,延长
交于点F,若
,求
的值;
(3)如图③,若
为等腰三角形,
,点G为
内一点,连接
,且
,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3648c864f9f58da1dbb166fee84cfeaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d021981c03e75b1a246d899dcc64656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc7d6fc454d7e5f683b7d34fa383a6a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/dd9be411-1013-42ce-863e-5e0cbf3d0dd7.png?resizew=344)
(1)如图①,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa98026a648010decfaf672dc9141c9.png)
(2)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4878c22a50d3707e43c4958c27867fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e96059db0e01a106c17b23d4e32689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda3953850f6107d759062998117f476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51acb3700f39a587ad3047b25498448a.png)
(3)如图③,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6060d9a82ed5405a1ea8cd824448b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcea6a052d80c410f218212122cca7cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bf7608632f8274e2bb5c153296fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
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|
305次组卷
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6卷引用:山东省济南市济南高新技术产业开发区2022-2023学年九年级上学期期末数学试题
山东省济南市济南高新技术产业开发区2022-2023学年九年级上学期期末数学试题(已下线)山东省济南市高新区2022-2023学年九年级上学期期末数学试题变式题16-202022年辽宁省营口市中考数学一模试题2023年辽宁省沈阳市新民市实验中学中考三模数学试题山东省临沂市临沭县大兴镇大兴初级中学2023-2024学年九年级上学期12月月考数学试题四川省眉山市东坡区万胜镇初级中学2023-2024学年九年级上学期期中数学试题