(1)问题提出
如图①,
为正方形
内一点,连接
,将
绕点
逆时针旋转
得到
,连接
.若
,当线段
取最大值时,求
的度数和正方形
的面积;
(2)问题解决
如图②,是某小区内设计的居民活动中心示意图,已知O是正方形
的中心,
是正方形
外一点,连接
,且
,
.按照设计要求,四边形
内部为成人活动室,阴影部分是儿童游乐场,设
的长为
,阴影部分的面积为
.
①求
与
之间的函数关系式;
②按设计要求,儿童游乐场(阴影部分)的面积为
,求
的长.
如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82979b6a2057d80bacba4a28973bd508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7654b4dbc0f9ba23055f4cb65560a223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005f8c8fee821935639283ffcb24aa8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)问题解决
如图②,是某小区内设计的居民活动中心示意图,已知O是正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d9bac27b9423b43f86b9d2e926c750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e5570e6cac94018e08e6573942b3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c98c9801f62610aadc1ad9b1554a5b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ffd001ed78d9a6617d6a17afb25c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9dce2b9844a048044786807b34fda6.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②按设计要求,儿童游乐场(阴影部分)的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e747a4f096e95d2e1d6a48ec5fbb13cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/6baf4424-8a7f-4718-a2b7-747a88c83016.png?resizew=391)
更新时间:2023-05-12 22:01:28
|
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解答题-证明题
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困难
(0.15)
【推荐1】如图1,平面直角坐标系中,点O为坐标原点,直线
与x轴交于点A,与y轴交于点C,过点C作直线
,交x轴于点B,且线段
.
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222217079144448/3233946100899840/STEM/d6843a6829694ee991faad5a69b00ec8.png?resizew=660)
(1)求直线
的解析式;
(2)如图2,点D是线段
上一点,点E在
的延长线上,连接
,若
,求证:
;
(3)如图3,在(2)的条件下,点G为第四象限内一点,且点E的横坐标小于点G的横坐标,连接
,且
,连接
交x轴于点F,使
.点M为第二象限内一点,连接
交x轴于点P,交y轴于点N,连接
,使
,若
,
,求点N的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd144e0e96e4236a14523e0729cacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222217079144448/3233946100899840/STEM/d6843a6829694ee991faad5a69b00ec8.png?resizew=660)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,点D是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e72d5908c602cef688de2cbbb8861e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f306ba11b8632c1ca25bccf19f321bd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
(3)如图3,在(2)的条件下,点G为第四象限内一点,且点E的横坐标小于点G的横坐标,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b3bdec67b41630e2fd3f3e7b409133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7494f0bae9d1671048287d8389a9135b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/312c446a4790d75afde82f81e0e217ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
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解答题-问答题
|
困难
(0.15)
【推荐2】在平面直角坐标系
中,抛物线
与
轴交于
,
两点,过点
的直线
与
轴交于点
,交抛物线于点
.
(1)直接写出点
,
,
的坐标;
(2)如图1,点
是直线
上方第一象限内抛物线上的动点,连接
和
,求
面积的最大值;
(3)如图2,若点
在抛物线上,点
在
轴上,当以
,
,
,
为顶点的四边形是平行四边形时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db074016d48c94e99a98df2eff3361e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b098e17fa76c648424e9cadf558cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/5edd57b5-8147-4656-8d81-dbe1d8860af8.png?resizew=453)
(1)直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
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(3)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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解答题-证明题
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困难
(0.15)
名校
【推荐1】在正方形ABCD中,边长为2.点E是线段BC上的动点,以AE为直角边在直线BC的上方作等腰直角三角形AEF,
,其中EF交CD于点P,AF交CD于点Q,连接CF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/d21337a9-53c1-4e4f-bc3c-93a02c028810.png?resizew=303)
(1)如图1,①若
时,求线段CF的长:
②当点E在线段BC上运动时,求证:
.
(2)如图2,过点B作
交EQ于点G,过点D作
所在的直线于点H,求HG的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e123f197cda6ac41f00fb353e24314.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/d21337a9-53c1-4e4f-bc3c-93a02c028810.png?resizew=303)
(1)如图1,①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8470e3fbfbf3531ffea6c21bc228c6.png)
②当点E在线段BC上运动时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d15fa6c0d01a46436b924a0194da24.png)
(2)如图2,过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d95b61ec1e624487162d4d739ceb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6d5a196acdc6107c4516e86c148561.png)
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解答题-证明题
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困难
(0.15)
【推荐2】如图1,已知△ABC是等腰直角三角形,∠BAC=90°,点D是BC的中点,作正方形DEFG,使点A、C分别在DG和DE上,连接AE、BG,易证BG=AE且BG⊥AE.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992791017889792/3071973032214528/STEM/0c6ee9419b1b4870998deb43cd14d34d.png?resizew=485)
(1)如图2,将正方形DEFG绕点D逆时针方向旋转α(0°<α≤90°),试猜想线段BG和AE的数量关系和位置关系,并说明理由.
(2)将正方形DEFG绕点D逆时针方向旋转α(900<α≤3600),
①判断(1)中的结论是否仍然成立?请利用图3证明你的结论;
②若BC=DE=6,当AE取最大值时,求AF的值及此时α的度数.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992791017889792/3071973032214528/STEM/0c6ee9419b1b4870998deb43cd14d34d.png?resizew=485)
(1)如图2,将正方形DEFG绕点D逆时针方向旋转α(0°<α≤90°),试猜想线段BG和AE的数量关系和位置关系,并说明理由.
(2)将正方形DEFG绕点D逆时针方向旋转α(900<α≤3600),
①判断(1)中的结论是否仍然成立?请利用图3证明你的结论;
②若BC=DE=6,当AE取最大值时,求AF的值及此时α的度数.
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解答题-证明题
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困难
(0.15)
【推荐1】如图,在Rt△ABC中,∠ACB=90°,∠A=30°,点O为AB中点,点P为直线BC上的动点(不与点B、点C重合),连接OC、OP,将线段OP绕点P顺时针旋转60°,得到线段PQ,连接BQ.
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977602286067712/2978638589444096/STEM/f21106e8-1418-4b39-85c5-1c20ddea6592.png?resizew=595)
(1)如图1,当点P在线段BC上时,连结OQ,则△OPQ是 三角形;△COP≌△ ;线段BQ与CP的数量关系为 ;∠PBQ的度数
为 (请直接写出)
(2)当点P在CB延长线上时(如图2)和BC延长线上时(如图3),(1)中的线段BQ与CP的数量关系是否成立?若成立,请加以证明;若不成立,请说明理由;(图2、图3选择一种情况写出证明过程即可)
(3)如图2,若∠BPO=15°,则BQ与BP的数量关系为 ;
(4)如图3,若∠BPO=15°,AB=
,则PQ的长为 .
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977602286067712/2978638589444096/STEM/f21106e8-1418-4b39-85c5-1c20ddea6592.png?resizew=595)
(1)如图1,当点P在线段BC上时,连结OQ,则△OPQ是 三角形;△COP≌△ ;线段BQ与CP的数量关系为 ;∠PBQ的度数
为 (请直接写出)
(2)当点P在CB延长线上时(如图2)和BC延长线上时(如图3),(1)中的线段BQ与CP的数量关系是否成立?若成立,请加以证明;若不成立,请说明理由;(图2、图3选择一种情况写出证明过程即可)
(3)如图2,若∠BPO=15°,则BQ与BP的数量关系为 ;
(4)如图3,若∠BPO=15°,AB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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解答题-问答题
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困难
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【推荐2】如图1,抛物线y=﹣x2+2x+3的图象与x轴交于点A、B,与y轴交于点C,连接BC.
(1)求直线BC的解析式;
(2)如图2,点P是抛物线在第一象限内的一点,作PQ∥y轴交BC于Q,当线段PQ的长度最大时,在x轴上找一点M,使PM+CM的值最小,求PM+CM的最小值;
(3)抛物线的顶点为点E,连接AE,在抛物线上是否存在一点N,使得直线AN与直线AE的夹角为45度,若存在请直接写出满足条件的点N的坐标,若不存在,请说明理由.
(1)求直线BC的解析式;
(2)如图2,点P是抛物线在第一象限内的一点,作PQ∥y轴交BC于Q,当线段PQ的长度最大时,在x轴上找一点M,使PM+CM的值最小,求PM+CM的最小值;
(3)抛物线的顶点为点E,连接AE,在抛物线上是否存在一点N,使得直线AN与直线AE的夹角为45度,若存在请直接写出满足条件的点N的坐标,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/1/21/2381673676226560/2382298898120704/STEM/291603ad73704e7eb918af598d177723.png?resizew=453)
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