问题提出
(1)如图1,
是
的内接圆,
,
,则
半径长等于______;
问题探究
(2)如图2,在矩形
中,
,若在边
上存在一点P,使得
,求矩形
面积的最大值;
问题解决
(3)如图3,是一个矩形广场,其中
,
足够长.为了方便居民生活,促进经济发展,街道计划在矩形内部修建一个面积尽量大 的交易市场
,其中C,D分别在边
,
上,且
.在具体施工中安全联防小组要求在
上找到一点Q,使得
,以便安装摄像头对市场进行安全监管.请问满足上面要求的市场
是否存在,若存在,请求出市场
面积的最大值;若不存在,请说明理由.
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
问题探究
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
问题解决
(3)如图3,是一个矩形广场,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d68ed01cac3a30c9321376d5190230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386c7de62e8f9a8161ebaefe6b4ec35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a905adbbb180485b97a0f92534a1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/8f19db7c-b8b2-4f55-8474-ac6b5e562bc3.png?resizew=486)
2023·陕西西安·二模 查看更多[4]
更新时间:2023-05-10 10:41:15
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相似题推荐
解答题-证明题
|
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名校
【推荐1】
内接于
,点
在弧
上,连接
、
,
交
于点
,
.
(1)如图1,求证:
是等边三角形;
(2)如图2,点
为弧
上一点,连接
、
,若
,求证:
;
(3)如图3,在(2)的条件下,连
、
,若
的面积为
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbffba9efc6ad2a80adf80c61f2828f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/7adc4619-1faf-4d8c-9ef8-f0f0409b0e79.png?resizew=395)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92c169e43e41dbdcc6d2d0f8c1fe848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010a795d2d8e986a7bab61922a317791.png)
(3)如图3,在(2)的条件下,连
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e5a933a2a0ff3a28009cc989293ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73882a6f25d3b95ebb1e3c0b23d44bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402c0f9eecfcdf73f9e87ca82a6f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐2】如图,
是
的直径,
是
的切线,
交
于
,点
是弧
上一点,
.
(1)求证:
是
的切线;
(2)若
,求
的值.
![](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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eea328811717ab763fe1f97babcc754.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/dad3ff0a-ee09-4705-b5d4-b95eaf134b95.png?resizew=485)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa7a344b8f261c3e260fbf384cbc858.png)
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【推荐3】阅读材料,回答下列问题:
【问题提出】几何学的产生,源于人们对土地测量的需要,后来由实际问题转换成了数学问题,初中数学常用的几何模型有很多,但是通过整理归纳,就可以从这些基本模型找到其中所蕴含的规律.
【问题解决】
如图1,在四边形
中,
,
,过点
作
于点
,连接
,发现
,
,
之间的数量关系是___________;
【问题探究】
如图2,在四边形
中,连接
,
,点
是
两边垂直平分线的交点,连接
,
.
探究一:
与
之间有怎样的数量关系?请说明理由;
探究二:连接
,已知
,
,
,求
的长(用含
,
的式子表示).
【拓展延伸】
如图3,
中,
,
,点
为边
上一点(不与
、
重合),过
作
于
,作
交
于点
,连接
,将线段
绕点
顺时针旋转
到
,连接
,
拓展一:线段
、
、
之间有怎样的数量关系?请说明理由;
拓展二:若
,求
的值是___________.
【问题提出】几何学的产生,源于人们对土地测量的需要,后来由实际问题转换成了数学问题,初中数学常用的几何模型有很多,但是通过整理归纳,就可以从这些基本模型找到其中所蕴含的规律.
【问题解决】
如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e2c20d959ff812b6349efce365a996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c9e1ef4bb574a8dba55c84a213a633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783b84ed8d927b77491092f7d2ee2989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
【问题探究】
如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fe309928b35b06e206780a53a9c297.png)
探究一:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
探究二:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3be96420ac78c8621fcb47a45514fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34293b0e5b0ccd82aaf2197561865efc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2b79d2e11f2d100d3dad3fb718345b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
【拓展延伸】
如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b154270249b0ef54ddb26137b2681a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e128b6f457793c1ff385a7a5cd4d497.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/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
拓展一:线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
拓展二:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10bbcf8880532db1e72a284667dad05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2af7bd9a49f355fa1cddd43af0ccfab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/f74a17d8-8067-4f97-bd31-345ffe9a55c6.png?resizew=428)
您最近一年使用:0次
【推荐1】已知抛物线
经过
、
、
三点,直线l是抛物线的对称轴.
(2)设点P是直线
上的一个动点,当
的周长最小时,求点P的坐标;
(3)在直线l上是否存在点M,使以
、
、
为顶点的三角形为直角三角形.若存在,求出点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c33700c3358cbbd8db376f9f0613b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbb898663f98b8400a897913b4d3102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
(2)设点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4d1ecb7544d0be8669d1b19f60c4da.png)
(3)在直线l上是否存在点M,使以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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真题
名校
【推荐2】如图,点C为△ABD外接圆上的一动点(点C不在
上,且不与点B,D重合),∠ACB=∠ABD=45°.
,三者之间满足的等量关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
(2)连结CD,求证:AC=BC+CD;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0454210df4528426174815bc3df341.png)
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【推荐1】如图,
与
相切于点
,
为
直径,连接
,交
于点
,过点
作CE//OA交
于点
,连接
,交
于点
,点
为
上一点(点
在直径
左侧),且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/5381d171-0733-4e75-bbc4-1f415ddd77aa.png?resizew=167)
(1)求证:
是
的切线.
(2)连接
,若
,
,求
的长.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc08baf67044328fb366669a454826a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/5381d171-0733-4e75-bbc4-1f415ddd77aa.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c5d95bd3ae3e3070727300deb5d8fbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad471e694a3be65ca5ca22c5f2ac45cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图,PA,PB是⊙O的切线,A,B为切点,AC是⊙O的直径.
(1)若∠BAC=25°,求∠P的度数;
(2)若∠P=60°,PA=2
,求AC的长.
(1)若∠BAC=25°,求∠P的度数;
(2)若∠P=60°,PA=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2020/7/1/2496291233783808/2497038358888448/STEM/c66d4e6f5bdf44d282fb792e99f7c222.png?resizew=198)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图1,抛物线
与x轴交于A,B两点(点A在B的左侧),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2e246ad7-2642-4b9a-97b8-4d5b2153e7eb.png?resizew=321)
(1)当
时,直接写出:点B的坐标为______,点C的坐标为______;
(2)在(1)的条件下,P是x轴下方抛物线上的一点,且
,求点P到y轴的距离;
(3)当
时,若
的外心在x轴上,求代数式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c1f3e62e6af7db53919d1e1ed2388a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2e246ad7-2642-4b9a-97b8-4d5b2153e7eb.png?resizew=321)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129ddd2ea97fd010b9e0b644225da8c.png)
(2)在(1)的条件下,P是x轴下方抛物线上的一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0211fc2853acb9e38658281d5259b872.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b88c0f56ba866e99aacfd7e00998e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fba6bbec00744ee252979b412be93f.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
名校
【推荐2】如图是由小正方形组成的
网格,每个小正方形的顶点叫做格点,
,
,
,
四个格点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/246b3e91-dc7d-4b43-b12b-194845425468.png?resizew=243)
(1)直接写出
的度数为:____________;在平面内仅用无刻度的直尺和圆规画出
的外接圆;
(2)请仅用无刻度直尺作出(1)中弧
的中点E和
的高
;
(3)请仅用无刻度直尺在
上找一点
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021ef18914b89d2404fd86397efbc31b.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/246b3e91-dc7d-4b43-b12b-194845425468.png?resizew=243)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)请仅用无刻度直尺作出(1)中弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(3)请仅用无刻度直尺在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2933d2d221d92801d3ac7081688c5dfa.png)
您最近一年使用:0次