1 . 如图,正
的边长为1,
分别是边
上的点,将三角形沿
对折,顶点
恰好落在边
上的点
处,设
,求
满足的关系式并在直角坐标系中画出大致图像,求出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98842968c75427c940b34de391a3a778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c6f95fb0f50d816861bc3a526aee76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e89e2468f74be03fd14c62e1a157e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9defa23d2a9b88f4dd10e0ea4bef2189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/e4bfcfd8-40db-489f-9b73-4bc66ef9e712.png?resizew=155)
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2 . 如图,阴影部分是半圆
内的封闭图形,已知弦
与弦
平行,且平行线
与
之间的距离为
,
.求
的长(精确到
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad491e5b5e14c49ef8b7004ebcfcef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0dc85dfc6737542fff6870ff30cf738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2644b7fe01f40c70f4a06f1b8d2b33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/88e64c35-96b5-4936-bcf7-22ae9dab0c66.png?resizew=163)
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3 . 如图,
的一条弦的弦心距为
,在两个弓形内分别作两个正方形
,其中,点
都在圆弧上,点
都在这条弦上.求这两个正方形的边长的差(大边减小边).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3159ecb2ebc7c81978d218f4114a9ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425d3141e12f046ba3c4c2a617e63ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ae3707b0ea8491cf26d011530303a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a832004d89eb68bc87553bb609625b23.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/09de2651-6da3-4b0d-9f51-9de2800fe23c.png?resizew=170)
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4 . 如图,
是单位圆
的直径,过点
作
的切线CB,再作
,交
于点
;自
作
,联结
.则
的长为______ .(精确到0.0001).
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ea1f748375b661051ae24c0592220e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.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/0bcd79c6509e1d233f3da3adfbc23782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/0bba0fc1-b7ab-4a18-9028-532703c1343f.png?resizew=197)
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5 . 如图,在△ABC中,0为边BC的中点,点M、N分别在边AB、AC上,且AM=6,MB =4,AN=4,NC=3,∠MON=
,求∠A的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/eb0e46b5-c958-440e-847a-46f820544a95.png?resizew=130)
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2018-12-16更新
|
141次组卷
|
2卷引用:2011年新知杯上海市高中数学竞赛试题
6 . 已知M是椭圆
在第一象限的弧上一动点,MN ⊥y轴,垂足为N. 当△OMN面积最大时 ,其内切圆半径r=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f61bc15af695694e89cdb128253dad.png)
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7 . 如图,已知四边形
是边长为1的正方形,点
、
、
、
顺次在边
、
、
、
上,且
.过点
、
、
、
分别作射线
、
、
、
,且
,这里
为定角,且
,由此得到四边形
.
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096449994063872/2097421655056384/STEM/15eef85763ef4a3f8c3b803ada4dde67.png?resizew=150)
(1)问四边形
是怎样的四边形?证明你的结论.
(2)设
,试将
表示成
的函数.
(3)是否存在
,使
为与
无关的定值?若存在,求出相应的
的值;若不存在,说明理由.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621756c7b5fa4944120e9649ed2aeb36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7032213f46269954ee14876934031909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d52486ff281aeb7dff426ae3040adcd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae626b30192bba5c433d399bba65411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff229f941e31904f9d83fcf517d3e696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a806f8080f09f7197643cae90d4d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134c3d2c318a33a82da4134dd17fa57e.png)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096449994063872/2097421655056384/STEM/15eef85763ef4a3f8c3b803ada4dde67.png?resizew=150)
(1)问四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134c3d2c318a33a82da4134dd17fa57e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ff0a6113c45cbf1bba72ebba589a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916bb2cc1b29574ff95b47567c59ee0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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8 . 由方程
所对应的曲线围成的图形面积________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6142b0876da307d021748bc7014545.png)
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9 . 如图,
是边长为1的正方形,点
、
分别在边
、
上,
,
,
,
,其中
、
、
、
为垂足,且
.则四边形
的面积是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8169b4bd7334949571b8134d8d4ff8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d18162f2812a82f25d7a30880d88a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efef00949211a0f783a0975e1be74f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e792f398f6706578693d72a7ea8586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8295041350daa78aee4bb8cc68a8050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096451447627776/2097219921256448/STEM/a97a2230-d177-4dd9-bede-d74a78c58813.png)
您最近一年使用:0次