1 . 如图所示,在
中,点
在
边上,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/a5b4a0d2-1629-4d90-99fb-a6479cb11e05.png?resizew=488)
(1)若
.
①如图1,若
,
,过
作
于点
,直接写出
的值为 ;
②如图2,若
,求
的值.
(2)如图3,已知
为
的角平分线,
,
,直接写出线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/a5b4a0d2-1629-4d90-99fb-a6479cb11e05.png?resizew=488)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092f6c8e7e90d46c1ee0457f17daeb4a.png)
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629be4a6de577f13c9b0a524e7a5e383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b62ce0cbffa4758c7a0e6fb7ca4d24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c06aa28f4e4ee00cdf3c8e7847225ed.png)
②如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7e75d7342e6f087370d09181b17a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120223970943dc87c216b0860e502254.png)
(2)如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e50f0d02d0bd51ae361d276ed9dea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d035c3a7a6126dabbba817cf0506a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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2 . 如图,在
的正方形网格中,
都是格点,
为圆
的直径,
在圆
上,请仅用无刻度直尺完成下列作图(保留作图痕迹)
(1)作点
关于直线
的对称点
;
(2)直接标出弦
的中点及圆
的圆心
,并作
弧的中点
;
(3)在射线
上作点
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd557c3ac7908fe535f678a50361b820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/e5d1f9a5-5225-4d65-b6b0-3d0bbf83826f.png?resizew=166)
(1)作点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)直接标出弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ea3fb90a170f7e4c3b6fae814c3721.png)
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3 . 如图所示,在四边形
中,
,
,在
、
分别找一个点
、
,使
的周长最小,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1939f6a87228b730a32d996014ff3bd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73684ef04ef67bc31f52fb5f841a6423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79a7ef38e3119d1f151deadf617ec94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/b34ab214-6fef-4b6d-8ba3-4a222021fc51.png?resizew=141)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 小明在练习操控航拍无人机,该型号无人机在上升和下落时的速度相同,设无人机的飞行高度为
(米),小明操控无人飞机的时间为
(分),
与
之间的函数图象如图所示. 以下结论:①无人机从40米上升到60米用时1分钟;②无人机在40米的高度上飞行了3分钟;③无人机距地面的高度为50米时
的值为5.5;④无人机从60米的高度返回地面用时3分钟.其中结论正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/41b418e3-b947-47fc-8ab3-3fc4eb049bbd.png?resizew=171)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/41b418e3-b947-47fc-8ab3-3fc4eb049bbd.png?resizew=171)
A.4 | B.3 | C.2 | D.1 |
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5 . 如图,
中,
,
,
绕点
逆时针旋转
得到
,
与
,
分别交于点
,
.设
,
的面积为
,则
与
的函数图象大致( )
![](https://img.xkw.com/dksih/QBM/2024/2/4/3425681623695360/3426131836395520/STEM/ba782348dd56404a8e0d4de225cb4db9.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0769bbeb13bd66ee39f530417be0f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2eb0de024a6f3f65e94e87f2dce80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/1613815aa66f130f02405617022548be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff58d298aecfc45f81c62bb4e70a768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2024/2/4/3425681623695360/3426131836395520/STEM/ba782348dd56404a8e0d4de225cb4db9.png?resizew=136)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知
是
的直径,
是
上一点且
,
是弧
的中点,
,
,垂足分别是
.下列结论:①
;②
;③
四点在同一个圆上;④
,其中结论正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/66011999-d373-4672-8349-cbe2a0312b77.png?resizew=155)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15301873a51b67db462f4d78b8bffc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff7bf8ffc8a04186e3e13c1a6d5ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf857e03d4320c999d328fd657c2d412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f4a6920a0dc269d5d1781e87fe84f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9958e740f5475010ef2dc6ba71cb75e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41b4cccc4ae6b5c1aef8e9b9d717cfc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/66011999-d373-4672-8349-cbe2a0312b77.png?resizew=155)
A.4 | B.3 | C.2 | D.1 |
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解题方法
7 . 某企业为了增收节支,设计了一款成本为20元/件的工艺品投放市场进行试销. 经过调查,得到如下数据:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/b9369bea-ef24-457e-be6d-f0bcae2a5ef3.png?resizew=169)
(1)把上表中
的各组对应值作为点的坐标,在下面的平面直角坐标系中描出相应的点,根据所描出的点猜想
是
的什么函数,并求出函数关系式;
(2)当销售单价定为多少时,工艺厂试销该工艺品每天获得的利润最大?最大利润是多少?(利润=销售总价-成本总价)
(3)为了支持希望工程,在实际的销售过程中该公司决定每销售一件工艺品就捐
元给希望工程,公司通过销售记录发现,当销售单元价不超过51元/件时,每天扣除捐赠后的日销售利润随销售单价
的增大而增大,求
的取值范围.
销售单价 | … | 30 | 40 | 50 | 60 | … |
明天销售量 | … | 500 | 400 | 300 | 200 | … |
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/b9369bea-ef24-457e-be6d-f0bcae2a5ef3.png?resizew=169)
(1)把上表中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baeaaab224679fcc45049e10ba0c23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当销售单价定为多少时,工艺厂试销该工艺品每天获得的利润最大?最大利润是多少?(利润=销售总价-成本总价)
(3)为了支持希望工程,在实际的销售过程中该公司决定每销售一件工艺品就捐
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66cefb34453936e220c74220896a14da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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8 . 如图,小林同学为了测量某江南某名楼的高度,他站在
处仰望楼顶
,仰角为
,走到点
处仰望楼顶
,仰角为
. 眼睛
、
离同一水平地面
的高度为1.6米,
米,则楼顶
离地面的高度
约是_________________ 米(
取1.732,
取
,按四舍五入法将结果精确到
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe8140a38ee6b0b28a5b661f8b1f3d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe8dc472dade6cea6943164792ab532.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/fc8b62dc033d86ee9e561b8903796701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f32b47d169e59b6c976869adff0821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0518dacf25a62875908680da8ba840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8065456efeb595b1ee723ed03029e0ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/d11cfa66-21ab-434f-aae7-c5e2c91ada6f.png?resizew=165)
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9 . 已知反比例函数
的图像经过点
.
(1)求
的值为 ;
(2)完成下列解答:解不等式组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504df4bcf895161e82a657da3c5e082a.png)
(Ⅰ)解不等式①,得 ;
(Ⅱ)根据函数
的图像,得等式②的解集为 ;
(Ⅲ)把不等式①和②的解集在数轴上表示出来,得到不等式组的解集为 ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7e80d8fb6c014b585cb0902275600b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)完成下列解答:解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504df4bcf895161e82a657da3c5e082a.png)
(Ⅰ)解不等式①,得 ;
(Ⅱ)根据函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
(Ⅲ)把不等式①和②的解集在数轴上表示出来,得到不等式组的解集为 ;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/f840ee68-a215-486b-b43f-a1e1152c8e5b.png?resizew=218)
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10 . 某广场有一喷水池,水从地面喷出,如图,以水平面为
轴,出水点为原点,建立平面直角坐标系,水在空中划出的曲线是抛物线
(单位:米)的一部分,则水喷出的最大高度是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/6e38f1a6-cbe6-4e7e-a11c-314c0c26e4b0.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572f286fb45b2757af63569ae0bc2e99.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/6e38f1a6-cbe6-4e7e-a11c-314c0c26e4b0.png?resizew=159)
A.4米 | B.3米 | C.2米 | D.1米 |
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