综合与实践
数学模型可以用来解决一类问题,是数学应用的基本途径.通过探究图形的变化规律,再结合其他数学知识的内在联系,最终可以获得宝贵的数学经验,并将其运用到更广阔的数学天地.
和
中,
,
,
,连接
,
,延长
交
于点
.则
与
的数量关系:______,
______
;
(2)类比探究:如图2,在
和
中,
,
,
,连接
,
,延长
,
交于点
.请猜想
与
的数量关系及
的度数,并说明理由;
(3)拓展延伸:如图3,
和
均为等腰直角三角形,
,连接
,
,且点
,
,
在一条直线上,过点
作
,垂足为点
.则
,
,
之间的数量关系:______;
(4)实践应用:正方形
中,
,若平面内存在点
满足
,
,则
______.
数学模型可以用来解决一类问题,是数学应用的基本途径.通过探究图形的变化规律,再结合其他数学知识的内在联系,最终可以获得宝贵的数学经验,并将其运用到更广阔的数学天地.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d0dd547921b8a35acf7b407fac21b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b5c0e0724cce5c25a88dca5e9220c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)类比探究:如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2ee144fbda9152177857f19d5aaede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
(3)拓展延伸:如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a93128719573a60a1bdcf0ede1116b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396632dba26d326a6b69f0bb7016bd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(4)实践应用:正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d5974e8669eb588401203de18a3ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bec03e804f0cea1db5cde2aa185056a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cde75c806c60b4319ba2c1bc2f3dc91.png)
2023·黑龙江齐齐哈尔·中考真题 查看更多[12]
2023年黑龙江省齐齐哈尔市中考数学真题(已下线)专题17 几何压轴题-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(全国通用)湖北省荆楚初中名校联盟2023-2024学年九年级上学期期中数学试题湖北省襄阳市八校2023-2024学年九年级上学期联考数学试题(已下线)专题6 类比思想(已下线)数学(山西卷)-学易金卷:2024年中考第一次模拟考试江西省吉安市十校联盟2023-2024学年九年级下学期期中数学试题(已下线)突破05 平移、旋转、折叠等操作探究问题(4类重点考向)-备战2024年中考数学真题题源解密(全国通用)(已下线)专题10 三角形压轴题综合-2024年中考数学二轮热点题型归纳与变式演练(全国通用)2024年河南省驻马店市确山县中考二模数学试题2023年江苏省盐城市初中学业数学水平模拟预测题甘肃省平凉市庄浪县联盟校2023-2024学年九年级下学期4月期中考试数学试题
更新时间:2023-06-28 11:31:04
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,在
和
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/cc8a744b-ce95-4541-9fa2-b08733645ae0.png?resizew=322)
(1)求证:
;
(2)如图2,
为等腰三角形,
,
,点P为
所在平面内一点,
,
,
.
①求
的长;
②直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43651721f6c0ea4cf50a33054ecc5d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/cc8a744b-ce95-4541-9fa2-b08733645ae0.png?resizew=322)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b3bfde4b7cbca10de7d63bb7b2cfd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb2dce15f3d0fe839688575d2a8ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83f70e69dca65099b91f61878b1ca27.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
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【推荐2】如图,在等边△ABC中,线段AM为BC边上的高,D是AM上的点,以CD为一边,在CD的下方作等边△CDE,连结BE.
(1)填空:∠ACB=____;∠CAM=____;
(2)求证:△AOC≌△BEC;
(3)延长BE交射线AM于点F,请把图形补充完整,并求∠BFM的度数;
(4)当动点D在射线AM上,且在BC下方时,设直线BE与直线AM的交点为F.∠BFM的大小是否发生变化?若不变,请在备用图中面出图形,井直接写出∠BFM的度数;若变化,请写出变化规律.
(1)填空:∠ACB=____;∠CAM=____;
(2)求证:△AOC≌△BEC;
(3)延长BE交射线AM于点F,请把图形补充完整,并求∠BFM的度数;
(4)当动点D在射线AM上,且在BC下方时,设直线BE与直线AM的交点为F.∠BFM的大小是否发生变化?若不变,请在备用图中面出图形,井直接写出∠BFM的度数;若变化,请写出变化规律.
![](https://img.xkw.com/dksih/QBM/2018/1/21/1865282605006848/1865413961474048/STEM/202a75744fcb49caab7293735eeb4c7d.png?resizew=337)
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【推荐1】提出问题:
中,
,
,
,则BC边上的高AD的长为______;
问题探究:
(2)如图2,
内接于
,弦
,半径为6,求
面积的最大值;
问题解决:
(3)如图3,某园区内有一块直角三角形
的空地,在空地边
的中点D处修建了一个儿童游乐场,为了吸引更多人来园区,在空地外E处修建一个大型商场,且满足游乐场D到商场E的路线与商场E到点C处的路线垂直(即
),连接
,在
处种植绿植,其中
,测得
米,
米,请问绿植面积能否取到最大?若能,请求出
面积的最大值,若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
问题探究:
(2)如图2,
![](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/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
问题解决:
(3)如图3,某园区内有一块直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878a63a7899c8226744748a0102eab95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb91d806e628cf978557ffad6a7020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efaf743569d3b4abd3d0159e95aae774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
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【推荐2】已知点P为正方形ABCD的边BC上任意一点,连接AP,过点B作BE⊥AP于点E,使EF=AE,连接BE.
(1)如图①,求证:BF=BC;
(2)如图②,∠CBF的平分线交AF于点G,连接DG,求证
;
(3)若正方形的边长为2,当点P为BC的中点时,连接CF,求CF的长.
(1)如图①,求证:BF=BC;
(2)如图②,∠CBF的平分线交AF于点G,连接DG,求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596497a9efdd7edc6858c8531aaa35e0.png)
(3)若正方形的边长为2,当点P为BC的中点时,连接CF,求CF的长.
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721353187680256/2722172998533120/STEM/c07de75d-3611-411e-b44f-4a46a48afa48.png)
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【推荐1】正方形
的边长为4,点E在
上,点F在
上,且
,
与F交于G点.
![](https://img.xkw.com/dksih/QBM/2022/10/15/3088061615194112/3090973348241408/STEM/d3d23f76fa8845cea2f336deb29dc750.png?resizew=540)
(1)如图1,求证:①
,②
.
(2)连接
并延长交
于点H.
①若点E为
的中点(如图2),求BH的长;
②当点E在
的边上滑动(不与B、C重合)时,直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/42d4546153ab4353af86c0023f2c2092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2022/10/15/3088061615194112/3090973348241408/STEM/d3d23f76fa8845cea2f336deb29dc750.png?resizew=540)
(1)如图1,求证:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51cee4392cf5d4086b2e6c5b3b98341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe3df60bb876adde6da340b692e4e1.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①若点E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
②当点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
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解题方法
【推荐2】如图1,
内接于
分别是
和
所对弧的中点,弦
分别交
于点
,连结![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61656a03470361811686d432ddf1f69c.png)
(1)求证:
是等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/a68c89c0-7b4c-4068-9685-001e21409a36.png?resizew=191)
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefa2a35b2496dcc88e1a8f5c9be4ab5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/dc3d40aa-8670-4ac2-aa32-22d6443b85de.png?resizew=186)
①如图2,当
为
的直径时,求
的长.
②当
将
的面积分成了
的两部分时,求
的长.
(3)连结
交
于点
,若
:则
的值为_______. (请直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fc11207395cfb17d59c4dabf0ce78f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546aa8cd51904e89a070d628f663cd4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61656a03470361811686d432ddf1f69c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0681a84b4368ae8d11ed813b1353232a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/a68c89c0-7b4c-4068-9685-001e21409a36.png?resizew=191)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefa2a35b2496dcc88e1a8f5c9be4ab5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/dc3d40aa-8670-4ac2-aa32-22d6443b85de.png?resizew=186)
①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaecf08a22124a457128fb04c9c02bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)连结
![](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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba4f6715bf770e7cdc7b0534f41c446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e7e01495050cca64f635c2c2658157.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/c89d7ad6-c4b5-4677-a199-d5d4f32b714a.png?resizew=193)
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【推荐3】【问题解决】如图①,
是等边三角形,平面内一点D,满足
.连接AD,求证:
.
通过分析、思考,小颖同学形成了两种解题思路:
思路1:用截长法,在BD上截取
,连接AM,易证
,
思路2:用补短法,延长CD至点N,使得
,连接AN,易证
,
请在上述两种思路中选择一种,完成该问题的解答.
【类比探究】
如图②,
中,
,平面内一点D,满足
,连接AD,则线段AD,BD,CD之间的数量关系是__________;
![](https://img.xkw.com/dksih/QBM/2022/4/22/2967781801058304/2990528699564032/STEM/fc19efbb-0453-4395-9b08-87278cad7f40.png?resizew=587)
【应用拓展】
如图③,
中,
,平面内一点D,满足
,则
__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fe532cad7a1f9279d58874aa4def00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c8df6477cfbd4b58641922457003f6.png)
通过分析、思考,小颖同学形成了两种解题思路:
思路1:用截长法,在BD上截取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05aaeccb3b7fce3c4c6103be6e3394be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1431138f2ef8fcb6e28642369ddb38a.png)
思路2:用补短法,延长CD至点N,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f1393159581e8d4a3649960fceeaf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d4f3fb43825e5a423cf3fc955acbb7.png)
请在上述两种思路中选择一种,完成该问题的解答.
【类比探究】
如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ff1dc90384c31780d24bc92b757c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587458141d890533c0c32aa249a27ad0.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2967781801058304/2990528699564032/STEM/fc19efbb-0453-4395-9b08-87278cad7f40.png?resizew=587)
【应用拓展】
如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788f35d51c5f7d01fc0128a71b5e10f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb3854dbb6a4b2149726d3785d7da4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
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【推荐1】综合与实践
问题情境:
“综合与实践”课上,老师提出如下问题:如图1,在正方形
中,
是对角线
上的动点(与点
,
不重合),连结
,过点
作
,
,分别交直线
于点
,
.请说明
,并求
的值.
数学思考:
(1)请你解答老师提出的问题.
深入探究:
(2)如图2,老师将图1中的“正方形
”改为“矩形
”,其他条件均不变,并让同学们提出新的问题.
①“聪聪小组”提出问题:如图2,当
,
时,求
的值;进一步,当
时,直线写出
的值(用含
的代数式表示).
②“慧慧小组”提出问题:如图3,连结
,当
,
,
时,求
的长.
请解答这两个问题:
问题情境:
“综合与实践”课上,老师提出如下问题:如图1,在正方形
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/992a19339adac3a2f1aab1fbc11b1c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cd81afc27aa4b51f3d41c953e22964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/240dfffb3b4f1cd83ad8f9a1b8ac9b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd01a4cbd347fce1a7414eb9fa73d16.png)
数学思考:
(1)请你解答老师提出的问题.
深入探究:
(2)如图2,老师将图1中的“正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①“聪聪小组”提出问题:如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd01a4cbd347fce1a7414eb9fa73d16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8035f56ec80c9351e45e964c603d526f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd01a4cbd347fce1a7414eb9fa73d16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②“慧慧小组”提出问题:如图3,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
请解答这两个问题:
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【推荐2】如图,抛物线
经过
,
两点,与x轴交于另一点B.
求此抛物线的解析式;
若抛物线的顶点为M,点P为线段OB上一动点
不与点B重合
,点Q在线段MB上移动,且
,设线段
,
,求
与x的函数关系式,并直接写出自变量x的取值范围;
在同一平面直角坐标系中,两条直线
,
分别与抛物线交于点E、G,与
中的函数图象交于点F、
问四边形EFHG能否成为平行四边形?若能,求m、n之间的数量关系;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3595afdb72eebe866579f4b4be9bbbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8333029443d2e3400033ed4da5bffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde53e5845060516a1ed2717e2dbea13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c769a2724c30a77c2a1055f2376b05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d5ce81372eb858546cc5018d14477f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9221f16ddd1341d97f596c3894183a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cdf7aaf44733c758606ff325047ab1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82adc042dfb4dbfd1d8fcb5c6b3ecac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d459fdd11d93b61140162e5d39eb1eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66f1bbe916ac0fb93c2503875433011.png)
![](https://img.xkw.com/dksih/QBM/2018/8/21/2015304472838144/2017354573660160/STEM/6d29113db503422cb9102432fc1f2b92.png?resizew=173)
![](https://img.xkw.com/dksih/QBM/2018/8/21/2015304472838144/2017354573660160/STEM/f2926d8b33844f70bac85e6e10f44369.png?resizew=166)
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