【问题发现】
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804289867153408/2804297435684864/STEM/c7af429d-652b-433e-ad25-d5d34d625e7e.png?resizew=691)
(1)若四边形
是菱形,
,点P是射线
上一动点,以
为边向右侧作等边
,如图1,当点E在菱形
内部或边上时,连接
,则
与
有怎样的数量关系?并说明理由;
【类比探究】
(2)若四边形
是正方形,点P是射线
上一动点,以
为直角边在
边的右侧作等腰
,其中
,如图2.当点P在对角线
上,点E恰好在
边所在直线上时,则
与
之间的数量关系?并说明理由;
【拓展延伸】
(3)在(2)的条件下,如图3,在正方形
中,
,当P是对角线
的延长线上一动点时,连接
,若
,求
的面积.
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804289867153408/2804297435684864/STEM/c7af429d-652b-433e-ad25-d5d34d625e7e.png?resizew=691)
(1)若四边形
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ce322b763173805d32db4677ef8094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
【类比探究】
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5774d8bb7437c44f915cfb77b968960a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00261243d533be20524a309568e0a5b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
【拓展延伸】
(3)在(2)的条件下,如图3,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b7bd8a2436e2f2bb89fefa70139273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3cd61d00f89e68ccca2cac5c937783.png)
2021·内蒙古鄂尔多斯·二模 查看更多[6]
2021年内蒙古鄂尔多斯东胜区中考二模数学试卷(已下线)专题19 以三角形为载体的几何综合探究问题(已下线)专题20 以四边形为载体的几何综合探究问题江西省吉安市永丰县实验学校2022-2023学年九年级上学期数学期中试题江西省抚州市黎川县第一中学2023-2024学年九年级上学期期中数学试题2024年广东省深圳市新安中学(集团)初中部中考三模数学试题
更新时间:2021-09-09 11:00:38
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图1,四边形
内接于
,
为直径,
,
,
交于点E,
,过点O作
,垂足为G,交
于点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/beae3e62-a028-416a-904c-22887d6e8630.png?resizew=344)
(1)求
的半径;
(2)当
时,求
的值;
(3)延长
交
的延长线于点Q,当
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5489aaa6dc00789fcf126bf2fd744a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3780ad386dcc121df985401438a823a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/beae3e62-a028-416a-904c-22887d6e8630.png?resizew=344)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2653db1d3afb6d0ed66b936c02affa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e50f6118e7e7da7b83b7fc0e41bbde.png)
(3)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafbe2751f4f4c5a8e676818195e9111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8a50aef399fa0757065e438d14fb81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bdee7807edba89958c84bf4bb85f15.png)
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名校
【推荐2】在
中,
,点
是
边上一点,连接
.
(1)如图1,若
,
,
,求
的长;
绕点
逆时针旋转一定的角度得到线段
, 且
,连接
,点
是平面内一点,连接
、
,且
,
,连接
交
于点
,
,若
,求证:
;
,
为
中点,
,将
沿
所在直线翻折至
所在的平面内得到
,在直线
上有两个动点
、
(点
在点
左侧),
为平面内另一动点,且
,当
取得最小值时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288c5312258f015e93ea06b303f121cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.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/81ffa50f04646be42ff55e827f5c43b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac559a1a89bfb16e1c44cdd7ad2f2bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bc0cc876a60c8cbdccc6a9a0b5b993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e6df4090a1108bf31b75aa82efc977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ec64245bb5acc427b6051c8858ee6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e390298867719585cdbf1789147355b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86160657f7eecf7b0d1f86a5584dea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4381f631ff051a5d1abe5dbe8c7e54c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77526c5824b72fcdd90c27d9bfc97807.png)
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解答题-证明题
|
较难
(0.4)
名校
【推荐1】已知
是等边三角形,点D为平面内一点,连接
、
,
,
下方时,连接
,延长
到点E,使
,连接
.
①求证:
;
②如图②,过点A作
于点F,直接写出线段
、
、
间的数量关系;
(2)若
,
,直接写出点A到直线
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bcf905f3910d9238a44ef647835b3d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa80cfd38f59e5cbbb30628d03113689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
②如图②,过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f0e783b3f0fdbecacc5cb8612ffcef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00948a72b7c367ccda6badc2f7ff22fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】在
中,弦
平分圆周角
,连接
,过点
作DE//AB交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949498324041728/2957453232603136/STEM/0bc7cd9e3db14680b58eec45f4f8d48b.png?resizew=321)
(1)求证:
是
的切线;
(2)若
,且
是
的中点,
的直径是
,求
的长.
(3)
是弦
下方圆上的一个动点,连接
和
,过点
作
于点
,请探究点
在运动的过程中,
的比值是否改变,若改变,请说明理由;若不变,请直接写出比值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b664f3a011a2f1f31c66a2635c5367c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949498324041728/2957453232603136/STEM/0bc7cd9e3db14680b58eec45f4f8d48b.png?resizew=321)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26373698c5cff740745b4fbf2f04af67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e84accbdfc051019a7c6c1df40b871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a5fd043eb973279b18f4b9d0829c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ed85794039cff3a3f53b09a21fc08e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,正方形
的边长为4,点
,
分别在边
,
上,且
,
的延长线交
的延长线于点
,
的延长线交
的延长线于点
,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/11/12/2332212123959296/2332312930885632/STEM/8927d3749f2e4295a129f7a55f572a14.png?resizew=335)
(1)填空:
;(填“
”或“
”或“
”)
(2)线段
,
,
什么关系?请说明理由;
(3)设
,
①
的面积
有变化吗?如果变化.请求出
与
的函数关系式;如果不变化,请求出定值.
②请直接写出使
是等腰三角形的
值.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26526faf0e64ce31688026630b502427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://img.xkw.com/dksih/QBM/2019/11/12/2332212123959296/2332312930885632/STEM/8927d3749f2e4295a129f7a55f572a14.png?resizew=335)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95777a5aa465745ef2011bd042b3216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d890499dca9a8ef30addafe41d6e771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcb0816ee2da7ddd071156a900f9eed.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c7f3592f9d597d0f62a3c7074a9191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②请直接写出使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7febd1c80a63d8f204affb48f1f07c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
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【推荐2】(1)[问题提出]如图1,
为
的直径,点C为
上一点,连接
,若
,则
面积的最大值为 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/b55fa330-b242-47b8-b0b6-fd74bd0675c9.png?resizew=109)
(2)[问题探究]如图2,在四边形
中,
,
,点
分别在边
上.且
,若
,求
的长;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/11ed06a4-7882-45c6-8da6-18d290d37536.png?resizew=131)
(3)[问题解决]为进一步落实国家“双减”政策,丰富学生的校园生活,某校计划为同学们开设实践探究课.按规划要求,需设计一个正方形的研学基地,如图3.点
分别在正方形
的边
上,将
区域修建为种植采摘区,基地内其余部分为研学探究区,
的长为40m,
.为了让更多的学生能够同时进行种植,要求种植采摘区(
)的面积尽可能大,则种植采摘区的面积的最大值为_______m2,此时正方形
的边长为_______m.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/b55fa330-b242-47b8-b0b6-fd74bd0675c9.png?resizew=109)
(2)[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/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fc67cea7defd9b0eabd5e65edcb3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20cb2c77ea29b6eabbc477bc3743859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9eb456c912e01458c19b06e83a5c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15a08339bcd79e43df8945b4b2e6db6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/11ed06a4-7882-45c6-8da6-18d290d37536.png?resizew=131)
(3)[问题解决]为进一步落实国家“双减”政策,丰富学生的校园生活,某校计划为同学们开设实践探究课.按规划要求,需设计一个正方形的研学基地,如图3.点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20cb2c77ea29b6eabbc477bc3743859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa2be72873024c4c367c838c17f69c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/a04a9359-30f1-467b-aec8-b41c789b709d.png?resizew=120)
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解答题-证明题
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较难
(0.4)
【推荐3】“构造图形解题”,它的应用十分广泛,特别是有些技巧性很强的题目,如果不能发现题目中所隐含的几何意义,而用通常的代数方法去思考,经常让我们手足无措,难以下手,这时,如果能转换思维,发现题目中隐含的几何条件,通过构造适合的几何图形,将会得到事半功倍的效果,下面介绍两则实例:
实例一:1876年,美国总统伽非尔德利用实例一图证明了勾股定理:由
S四边形ABCD=S△ABC+S△ADE+S△ABE得
,化简得:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3133ef62aad6bdd6637140620f068fad.png)
实例二:欧几里得的《几何原本》记载,关于x的方程
的图解法是:
画Rt△ABC,使∠ABC=90°,BC=
,AC=
,再在斜边AB上截取BD=
,则AD的长就是该方程的一个正根(如实例二图)
请根据以上阅读材料回答下面的问题:
(1)如图1,请利用图形中面积的等量关系,写出甲图要证明的数学公式是 ,乙图要证明的数学公式是
(2)如图2,若2和-8是关于x的方程x2+6x=16的两个根,按照实例二的方式构造Rt△ABC,连接CD,求CD的长;
(3)若x,y,z都为正数,且x2+y2=z2,请用构造图形的方法求
的最大值.
实例一:1876年,美国总统伽非尔德利用实例一图证明了勾股定理:由
S四边形ABCD=S△ABC+S△ADE+S△ABE得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165ec7b6a2b621bc44feebc80b7cad3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3133ef62aad6bdd6637140620f068fad.png)
实例二:欧几里得的《几何原本》记载,关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf24c99b9ad5ea45b0e584c92334d4d.png)
画Rt△ABC,使∠ABC=90°,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576833b76e9cad3b523f87132308df99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce22731a412796fe2925e01f765d5976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576833b76e9cad3b523f87132308df99.png)
请根据以上阅读材料回答下面的问题:
(1)如图1,请利用图形中面积的等量关系,写出甲图要证明的数学公式是 ,乙图要证明的数学公式是
(2)如图2,若2和-8是关于x的方程x2+6x=16的两个根,按照实例二的方式构造Rt△ABC,连接CD,求CD的长;
(3)若x,y,z都为正数,且x2+y2=z2,请用构造图形的方法求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180f65360e4cbdb99388cdfe2816c6ba.png)
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460533462335488/2461175508770816/STEM/26660e232d074a97b679bce480a933bc.png?resizew=385)
您最近一年使用:0次
解答题-应用题
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较难
(0.4)
【推荐1】如图,在
中,
,
,
,动点
从点
出发,沿
方向匀速运动,速度为
,以
为直径作
,与
交于点
,连接
.设运动时间为
,解答下列问题:
取何值时,
平分
;
(2)设
的面积为
,求
与
的函数关系式;
(3)是否存在某一时刻
,使
与
相切?若存在,求出
的值;若不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6850a299395c314b8f8f2f8ca50c9895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f9fc63aeaac7f7e359f1bcd734a90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5b3220c04fc9978e911d96f7f09ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.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/36a1b09c653185842513e24ebba60bb3.png)
(3)是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐2】已知矩形
,
,将矩形
绕点B顺时针方向旋转
得到矩形
,连接
,点E从点D出发,沿
方向匀速运动,速度为
,同时点F从点
出发,沿
方向匀速运动,速度为
.设运动时间为t
.解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/864d79cb-58fc-4b5c-aac6-8248b41bec83.png?resizew=236)
(1)当t为何值时,
为
的中线;
(2)是否存在某一时刻t,使
?若存在,求出t的值;若不存在,请说明理由;
(3)设四边形
的面积为
,求S与t之间的函数关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f9f1a3305b418e110f6920bac3c039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ff6caeb45e6035364d7d2b6829f5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4336253885d52e43ba6eaa297ea847b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3f01e4827038203d423b664fc41053.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/864d79cb-58fc-4b5c-aac6-8248b41bec83.png?resizew=236)
(1)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3189b70377389050c639678ecf3e0e9.png)
(2)是否存在某一时刻t,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f4969af3b6b3555e84054ee6acc3a1.png)
(3)设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d4b05a1402beb3f13d4ce7d22089b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb194fd63b75af067ba10dee7471d299.png)
您最近一年使用:0次