(1)问题提出:如图①,在矩形
中,
,
,
是
上一动点,则
的最小值为_________
(2)问题探究:如图②,在正方形
中,
,点
是平面上一点,且
,连接
,在
上方作正方形
,求
的最大值.
(3)问题解决:为迎接2021年9月在西安举办的第14届全运会,打造体育历史文化名城,某小区对一正方形区域
进行设计改造,方使大家锻炼运动.如图③,在正方形内设计等腰直角
为健身运动区域,直角顶点E设计在草坪区域扇形
的弧
上.设计铺设
和
这两条不同造价鹅卵石路,已知
米,
米,
,
,若铺设
路段造价为每米200元,铺设
路段的造价为每米100元,请求出铺设
和
两条路段的总费用的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3318260948820af44fcfb598da6fb73d.png)
(2)问题探究:如图②,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922b1e3f3948b044ff8f53af2aa1f038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(3)问题解决:为迎接2021年9月在西安举办的第14届全运会,打造体育历史文化名城,某小区对一正方形区域
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/babea91663e479b0018ebac5e36374d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4997da49b3dfe98144ad13aed0d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7612afc3724b3cf381556994bc1821f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33f381b03270154695d6b5421b1e739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0d6068866683547b733dbe005031a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/3635a6bd-bfab-4f1e-830c-e27d32c18771.png?resizew=582)
更新时间:2023-10-18 23:15:15
|
相似题推荐
解答题-问答题
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解题方法
【推荐1】如图,在平面直角坐标系中,菱形
的边长为10,对角线
,点
是
的中点,点
、
是
上的动点,且
,求四边形
周长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f397a701af14a5b8118c72b0811988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.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/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://img.xkw.com/dksih/QBM/2020/8/21/2532611766706176/2532816567107584/STEM/b96eb61a3ba9480d8f7d1731d284c12e.png?resizew=138)
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名校
【推荐2】已知一次函数
.
(2)如图1,当
时,一次函数
的图象交x轴,y轴于A、B两点,点Q是直线
:
上一点,若
,求Q点的坐标;
(3)如图2,在(2)的条件下,直线
:
交AB于点P,C点在x轴负半轴上,且
,动点M的坐标为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3730da5b0e24bcf12d8fa840eb6e4ee1.png)
(2)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71471908991617852f8b27bceeb689cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b7f8863daa4e6a6383ef34de2f148b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c55170389228e42cd2a6df9f80403b5.png)
(3)如图2,在(2)的条件下,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a286892476aa47b0ad825aca3ba9b981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081d77e2a9fa7a1f9ac175181d1b85f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7421b0260b8cf00a55e2aa37939877d1.png)
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解答题-证明题
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【推荐1】如图,正方形ABCD中,点F是BC边上一点,连结AF,以AF为对角线作正方形AEFG,边FG与正方形ABCD的对角线AC相交于点H,连结DG.
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942478720114688/2943377862336512/STEM/7167a575c32e42b384ef87314cbf507b.png?resizew=225)
(1)证明:△AFC∽△AGD;
(2)若
=
,请求出
的值.
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942478720114688/2943377862336512/STEM/7167a575c32e42b384ef87314cbf507b.png?resizew=225)
(1)证明:△AFC∽△AGD;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0f405180e34fc36d15d86bb9af4182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2de50b1397530aef36c26e2cf22632.png)
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【推荐2】已知正方形
中,
,
绕点A顺时旋转,它的两边分别交
(或它们的延长线)于点M,N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/66e5e05c-bf1c-4019-85f5-7614facd1a40.png?resizew=419)
(1)如图1,当
绕点A旋转到
时,求证:
.
(2)当
绕点A旋转到
(如图2所示)时,线段
和
之间有怎样的数量关系?写出你的猜想,并加以证明.
(3)当
绕点A旋转到如图3的位置时,线段
和
之间又有怎样的数量关系?请写出你的猜想,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4794cf7c57bdd4825d9e6615e2527a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64cb9faca188676503d9a2f2e476b84d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/66e5e05c-bf1c-4019-85f5-7614facd1a40.png?resizew=419)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f3175a979c2f908d6c5665e14894b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ef6e64afc0d4e5c1a7b57581cf7456.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320ceb774d9df2d337221eb7fa55e9b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6173d957eb8bcdc572fd0f91a017fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6173d957eb8bcdc572fd0f91a017fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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解答题-证明题
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较难
(0.4)
【推荐1】如图,
为
的直径,点
在
上,连接
,满足
,将
位于
上方的部分沿着线段
翻折,翻折后的图形交
于点
,连接
并延长交
于点
,连接
,交翻折后的圆弧于点
.
(1)①求证:
;
②求证:
;
(2)过点
作
于点
,交翻折后的圆弧于点
.求证:
;
(3)若
,试求出
的最大值.
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0b58f946f9c9a53123930a003e45df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/f65bea99-ff42-4a2c-9db2-988fd32f7a1d.png?resizew=161)
(1)①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe3286bd84a88f5043fda0d40dc7e52.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d365cc7ce9022654091eee60bc1c2b7.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbfc35fc915ac7d4dc017e60ccdecbe.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/4dbbb5cd88354ef48c47657cd94f9497.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763c0ed9baecf74b0498c12c6255d4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b3307b08ceecce99793fd369ec8e72.png)
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【推荐2】如图1,已知圆O的圆心为原点,半径为2,与坐标轴交于A,C,D,E四点,B为OD中点.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424521945088/2927041957216256/STEM/b760c34d8e1e407392d6cb4689e6c3ce.png?resizew=501)
(1)求过A,B,C三点的抛物线解析式;
(2)如图2,连接BC,AC.点P在第一象限且为圆O上一动点,连接BP,交AC于点M,交OC于点N,当MC2=MN•MB时,求M点的坐标;
(3)如图3,若抛物线与圆O的另外两个交点分别为H,F,请判断四边形CFEH的形状,并说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424521945088/2927041957216256/STEM/b760c34d8e1e407392d6cb4689e6c3ce.png?resizew=501)
(1)求过A,B,C三点的抛物线解析式;
(2)如图2,连接BC,AC.点P在第一象限且为圆O上一动点,连接BP,交AC于点M,交OC于点N,当MC2=MN•MB时,求M点的坐标;
(3)如图3,若抛物线与圆O的另外两个交点分别为H,F,请判断四边形CFEH的形状,并说明理由.
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【推荐1】【概念认识】定义:对角线互相垂直且相等的四边形叫做垂等四边形.
(1)如图1,已知在垂等四边形
中,对角线
与
交于点E,若
,
,
,则
的长度=______cm.
【数学理解】(2)在探究如何画“圆内接垂等四边形”的活动中,小李想到可以利用八年级的所学三角形全等.如图2,在
中,已知
是弦,
是半径,求作:
的内接垂等四边形
.(要求:尺规作图,不写作法,保留痕迹)
【问题解决】(3)如图3,已知A是
上一定点,B为
上一动点,以
为一边作出
的内接垂等四边形(A、B不重合且A、B、O三点不共线),对角线
与
交于点E,
的半径为
,当点E到
的距离为
时,求弦
的长度.
(1)如图1,已知在垂等四边形
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c26ed4600cef25f040caa553ac21051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
【数学理解】(2)在探究如何画“圆内接垂等四边形”的活动中,小李想到可以利用八年级的所学三角形全等.如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
【问题解决】(3)如图3,已知A是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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解答题-问答题
|
较难
(0.4)
名校
【推荐2】在菱形
中,
,点E,F分别在边
上,且
平分
.
的中点,求
的值;
(2)如图2,若
,求
的值;
(3)如图3,若去掉条件“
平分
”,增加条件“
,
”,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8dbf16d3adcc74fbea454665bc66ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac37366d2b54dc7d9a95ac6ddda5f3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f1e72cbc30ad5fca807664692ea30b.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55c3f663b6b205bb0d541a72e4d4759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e825ec2c027c55d9f07817b4eb82f7d0.png)
(3)如图3,若去掉条件“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac37366d2b54dc7d9a95ac6ddda5f3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55c3f663b6b205bb0d541a72e4d4759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072c4701d354e68a37928902b0ab870f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e825ec2c027c55d9f07817b4eb82f7d0.png)
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