1 . 如图,直线
,直角三角形的直角顶点
在直线
上,若
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc8444d63d1ca92651c62fe9b220859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac56dcc9b3a42da408d4b6f9e643ada8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 如图,已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48eb9602d90cb28e23784bb78809f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08168b782ff5152ea9d467b2d8256238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530691ab381ab7f63a9c28cf52abc80a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-04-11更新
|
136次组卷
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2卷引用:2024年甘肃省兰州市中考一模数学模拟试题
3 . 如图是放在水平桌面上的手机支架图和截面示意图.已知手机支架底座是矩形
,固定杆
于点
,A到水平桌面的距离为
,调节杆
长为
,旋转杆
长为
,经调试发现,当
,
,时,手机恰能俯拍画面,求此时点
到桌面的距离.(结果精确到
,
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fd6c9f4d28d6b52e9be805b5870f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99b608394a674aa4dd6c65ead36a69b.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a9eed64d225267a58cd001db67e2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa6ac4ef1b2d2e35aa0262e0d05b597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a32af9c7baa934baaebbbc0562cf7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a0f8f5fabed2f1e761cd55660526c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac980ce194582899d857b5f6edd431e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702e8d9602884d50948248734a1e1324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/10/1853561e-8801-4e55-802e-9806ae3e3fb7.png?resizew=519)
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4 . 光线在不同介质中的传播速度是不同的,因此当光线从水中射向空气时,要发生折射,所以在水中平行的光线,在空气中也是平行的.若水面和杯底互相平行,
,则
与
的度数分别为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b3db86ea5a0495631aed1ffc68cd9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605f2976297a0deaa1602ef09d6a5afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4c3c0a34dc21292fa32befd58d8f82.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() |
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2024-04-09更新
|
159次组卷
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3卷引用:2024年辽宁省朝阳市建平县部分学校中考数学一模模拟试题
名校
5 . 如图,平移直线
至
,直线
,
被直线
所截,
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/42621270-668a-4ac1-aafd-e5e377878f13.jpg?resizew=121)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee4e0de0c1de0835766b7f627f348c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/42621270-668a-4ac1-aafd-e5e377878f13.jpg?resizew=121)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 如图,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
_______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a4352562ae8aa968014fd0d931b677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
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2024-04-08更新
|
89次组卷
|
2卷引用:2024年辽宁省大连市甘井子区九年级中考一模数学模拟试题
7 . 如图,在
中,
,
,
,点
是线段
上不与点
重合的动点,过点
作
交
边于点
.将
绕点
顺时针旋转
得到
,设线段
的长为
.
的代数式表示线段
的长;
(2)当点
落在线段
上时,求
的值;
(3)设
与
重叠部分的面积为
,当重叠部分为四边形时,求
与
的函数关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693c41862bf36d13d1579ccac1a056e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98f0db1041fa3f958e44c09a5483f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff41783418c5e11f70c71ee2e137566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e7c8586eef5596aef5fb5160a196a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592724a04099359fddd8865849d337e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657577411a577736b0abef62d7be9c26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b98ad8022f28f119aab784ccdbdfd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d990b28377226b2b40345f6c912612a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f159bdf3e82d6b58ad696ed844ab6d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b98ad8022f28f119aab784ccdbdfd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
8 . 如图,直线
被直线
所截,
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc801ea75bf98e73f72ba13b62dd6676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-04-04更新
|
208次组卷
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3卷引用:2024年广东省佛山市顺德区中考一模数学试题
9 . 如图,在
中,
,
平分
,过点
作
,与
交于点
,过点
作
,与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/4dc593e0-e030-46f0-8f74-f397e7d647e1.jpg?resizew=113)
(1)判断四边形
的形状,并说明理由;
(2)若
,
,则
的长为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24ee04b7e461c045431ce83d15a91de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/4dc593e0-e030-46f0-8f74-f397e7d647e1.jpg?resizew=113)
(1)判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec07464a1b5bc7a2cc338b1a13e0f4a6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b444047bda5a2e6b353aea97fdee5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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10 . 我们把一组对边平行而另一组对边不平行的四边形叫做梯形.在梯形中,平行的两边叫做梯形的底(通常把较短的底叫做上底,较长的底叫做下底);不平行的两边叫做梯形的腰;两底之间的距离叫做梯形的高.两腰相等的梯形叫做等腰梯形.
中,
,
平分
,若梯形的周长为10,腰长为2,则
的长为________.
(2)求证:等腰梯形同一底上的两个角相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求证:等腰梯形同一底上的两个角相等.
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2024-04-03更新
|
43次组卷
|
2卷引用:贵州省遵义市新蒲新区2023年初中生毕业认定测试九年级数学模拟预测题