如图,在平面直角坐标系中,直线
与x轴交于点A,与y轴交点C,抛物线
过A,C两点,与x轴交于另一点B.
![](https://img.xkw.com/dksih/QBM/2019/10/18/2314445496532992/2314610203164672/STEM/de9e0adce16d4f4eb4ba3acfa9908240.png?resizew=382)
(1)求抛物线的解析式.
(2)在直线AC上方的抛物线上有一动点E,连接BE,与直线AC相交于点F,当
时,求
的值.
(3)点N是抛物线对称轴上一点,在(2)的条件下,若点E位于对称轴左侧,在抛物线上是否存在一点M,使以M,N,E,B为顶点的四边形是平行四边形?若存在,直接写出点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e488bcf5c0eacfb5cb27a70038d4f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba23d524dc2a51f2a2f5a2eec842f22.png)
![](https://img.xkw.com/dksih/QBM/2019/10/18/2314445496532992/2314610203164672/STEM/de9e0adce16d4f4eb4ba3acfa9908240.png?resizew=382)
(1)求抛物线的解析式.
(2)在直线AC上方的抛物线上有一动点E,连接BE,与直线AC相交于点F,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f97e75d014fe7c5a86a92f9160539a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf1a27e6e6a1772a33f8baa6bd9b8e5.png)
(3)点N是抛物线对称轴上一点,在(2)的条件下,若点E位于对称轴左侧,在抛物线上是否存在一点M,使以M,N,E,B为顶点的四边形是平行四边形?若存在,直接写出点M的坐标;若不存在,请说明理由.
2019·辽宁朝阳·中考真题 查看更多[6]
辽宁省朝阳市2019年中考数学试卷2020年四川省成都七中万达学校中考数学三模试题2020年山东省聊城市莘县九年级初中学业水平二模数学试题(已下线)必刷卷03-2022年中考数学考前信息必刷卷(云南专用)2022年四川省渠县中学中考数学二模数学测试题(已下线)(挑战压轴)专项2.9 二次函数与平行四边形有关问题-2022-2023学年九年级数学下册《同步考点解读·专题训练》(北师大版)
更新时间:2019-10-18 14:29:25
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【推荐1】为了改善市民的生活环境,我市在某河滨空地处修建一个如图所示的休闲文化广场.在Rt△内修建矩形水池,使顶点、在斜边上,、分别在直角边、上;又分别以、、为直径作半圆,它们交出两弯新月(图中阴影部分),两弯新月部分栽植花草;其余空地铺设地砖.其中
,
.设
米,
米.
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/2081a1204b3a4b0491021593d65cc01a.png)
(1)求
与
之间的函数解析式;
(2)当
为何值时,矩形的面积最大?最大面积是多少?
(3)求两弯新月(图中阴影部分)的面积,并求当
为何值时,矩形的面积等于两弯新月面积的
?
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/ece1aec8dcd44d50bc3e4dccf02d957e.png)
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/f7758e626109439ab2e3bd8ac44d7b91.png)
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/39895e5a778442ae89ccf248ccad4c3b.png)
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/b1942bcf0df64ffeab6f9e5f8ef16c5c.png)
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/2081a1204b3a4b0491021593d65cc01a.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/d9addcc1863441afbb94f9400cacf039.png)
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/8546f784949f4ef89dc1883de222e9fd.png)
(2)当
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/8546f784949f4ef89dc1883de222e9fd.png)
(3)求两弯新月(图中阴影部分)的面积,并求当
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/8546f784949f4ef89dc1883de222e9fd.png)
![](https://img.xkw.com/dksih/QBM/2014/3/14/1573713862500352/1573713868873728/STEM/9ce5e8ac53fe4d1a8e82a59aa33e5539.png)
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【推荐2】某景区在旅游淡季对一个长为
米,宽为
米的长方形花卉区进行改建,为了保证改建后的花卉区面积变化不大,当宽长每减少
米的时,长相应增加
米,设宽减少
米,
(1)若改造后的花卉区面积与原花卉区面积一样大,求
的值;
(2)设改造后的花卉区面积为
平方米,求
与
的函数关系式,并求出改造后花卉区面积的最大值;
(3)若改造后的花卉区面积不超过原来面积的
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f959e5f8d89390f0f136f6acc9f6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)若改造后的花卉区面积与原花卉区面积一样大,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)设改造后的花卉区面积为
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若改造后的花卉区面积不超过原来面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb25dc4b4432d36c3c983d72cbceb92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解题方法
【推荐3】如图,抛物线y=ax2+bx﹣3经过点A(1,﹣1),B(﹣3,3),把y=ax2+bx﹣3与线段AB围成的封闭图形记为G.
(1)求此抛物线的解析式;
(2)点P为图形G中抛物线上一点,且点P的横坐标为m,过点P作PQ∥y轴,交线段
于点
,当
为等腰直角三角形时,求m的值;
(3)点C为直线AB上一点,且点C的横坐标为n,以线段AC为边作正方形ACDE,且使正方体
与图形
在直线
的同侧,当D,E两点中只有一个点在图形G的内部(不含边界)时,求n的取值范围
(1)求此抛物线的解析式;
(2)点P为图形G中抛物线上一点,且点P的横坐标为m,过点P作PQ∥y轴,交线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
(3)点C为直线AB上一点,且点C的横坐标为n,以线段AC为边作正方形ACDE,且使正方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736216720039936/2737075573809152/STEM/7190f283-6dfe-4cff-9d4e-e3c54ea2d801.png)
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【推荐1】已知四边形
是菱形,
,
的两边分别与射线
相交于点
,且
.
的中点时,直接写出线段
之间的数量关系(不必写出证明过程);
(2)如图2,当E是线段CB上任意一点时(点E不与点
重合),求证:
;
(3)如图3,当点E在线段CB的延长线上,直接写出线段
之间的数量关系.
(4)如图4,将图1放在平面直角坐标系中,点B与原点重合,若菱形边长为4,在平面内有一点P,使以
为顶点的四边形为平行四边形,直接写出点P的坐标.
![](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/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a6edded49d24fb5e78367265dd311f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9eb456c912e01458c19b06e83a5c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af53de5c87504ec3bd27b89747527685.png)
(2)如图2,当E是线段CB上任意一点时(点E不与点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fde166eb8fe559975f88ef7a3fcc76f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
(3)如图3,当点E在线段CB的延长线上,直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af53de5c87504ec3bd27b89747527685.png)
(4)如图4,将图1放在平面直角坐标系中,点B与原点重合,若菱形边长为4,在平面内有一点P,使以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5408fede12a617e088158190bb12c011.png)
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【推荐2】已知函数
与x轴、y轴分别交于A、B两点,C点坐标是(0,2),连接AC.
![](https://img.xkw.com/dksih/QBM/2019/6/20/2229882535706624/2231978564820992/STEM/441502da34f743e188c7b068b025c59a.png?resizew=292)
(1)直接写出A、B两点的坐标:A(______,_____)、B(_____,_____);
(2)在AB上找一点P,当PC+PO最小时,在AC上找一点Q使得PQ+
最小,求Q点坐标;
(3)在(2)的条件下,平面内能否找到一点K,使得点A、C、P、K构成的四边形是平行四边形,若能,直接写出K点坐标,若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cc0e44baeedd8dd7df21a85cca70d2.png)
![](https://img.xkw.com/dksih/QBM/2019/6/20/2229882535706624/2231978564820992/STEM/441502da34f743e188c7b068b025c59a.png?resizew=292)
(1)直接写出A、B两点的坐标:A(______,_____)、B(_____,_____);
(2)在AB上找一点P,当PC+PO最小时,在AC上找一点Q使得PQ+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8aff2619c784335a248de429e44c1.png)
(3)在(2)的条件下,平面内能否找到一点K,使得点A、C、P、K构成的四边形是平行四边形,若能,直接写出K点坐标,若不能,请说明理由.
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【推荐1】如图,抛物线
交
轴于点
,交
轴于点
,将线段
绕点
逆时针旋转
得到线段
,点
在抛物线上,连接
并延长交
轴于点
.
(1)求抛物线的解析式.
(2)将
以每秒1个单位长度的速度沿
方向平移,当点
与点
重合时停止运动.设平移的时间为
秒,
与
重叠部分的面积为
,求
与
之间的函数解析式.
(3)在坐标平面内存在一点
,使得以
为顶点的三角形与
全等,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/1/8cc32e3c-6609-4a9b-863c-9c41342cb5a8.png?resizew=460)
(1)求抛物线的解析式.
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acae4bf2a6bead9d904b70d0480fc0.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.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/36a1b09c653185842513e24ebba60bb3.png)
(3)在坐标平面内存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccc6be0d1a60deffdceef669d940031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】如图:已知
中,
,
,
,
,
点在
上(与
、
不重合),
在
上.
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599795777716224/2600610684018688/STEM/ffd51767cf484b09815c7821143b80a0.png?resizew=320)
(1)当
的面积与四边形
的面积相等时,求
的长;
(2)当
的周长与四边形
的周长相等时,求
的长;
(3)试问:在
上是否存在一点
,使得
为等腰直角三角形?若不存在,请简要说明理由;若存在,请求出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3bbc948e3db266a4d0f1b1c8474355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599795777716224/2600610684018688/STEM/ffd51767cf484b09815c7821143b80a0.png?resizew=320)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51ece6bb53c3f5bf2da7d9ee5960e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e98eb6db9c24321307c445af89a855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51ece6bb53c3f5bf2da7d9ee5960e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e98eb6db9c24321307c445af89a855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(3)试问:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99675fa03da205c4499967c9d908412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】【方法学习】
如图1在边长为1的正方形网格中,连接格点D,N和E,C,
和
交于点P,求
的值.
思考:求一个锐角的三角函数值,我们往往需要找出(或构造出)一个直角三角形.观察发现:
不在直角三角形中,并且顶点不在格点处,我们可以利用网格画平行线等方法解决此类问题,比如连接格点M,N,可得
,则
,连接
,那么
就变换到格点处,并且恰好在
中,可以方便求出
的值为______;
【问题解决】
(1)如图2,在边长为1的正方形网格中,
与
相交于点P,则
的值为______;
(2)如图3,在边长为1的正方形网格中,
与
相交于点P,则
的值为______;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/d6675813-6d59-45d6-bde8-9f8fca3b12dc.png?resizew=557)
【思维拓展】
(3)如图4,若干个形状、大小完全相同的菱形组成网格,网格顶点称为格点,已知菱形的较小内角为60度,点A,B,C,D都在格点处,线段
与
相交于点P求
的值.
如图1在边长为1的正方形网格中,连接格点D,N和E,C,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae8d7460b99722ad5f8f15aab09c2fa.png)
思考:求一个锐角的三角函数值,我们往往需要找出(或构造出)一个直角三角形.观察发现:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b91ef5ffdba260ce27659dce5c4ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ceb9af335cd78d67eac7120d36e9ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf8f34823528fdad222755e8351526a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b91ef5ffdba260ce27659dce5c4ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf2ab7668ce5e360663a2b7c387fa8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae8d7460b99722ad5f8f15aab09c2fa.png)
【问题解决】
(1)如图2,在边长为1的正方形网格中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3da6f562d4c6c17c73c32ce9d8698e.png)
(2)如图3,在边长为1的正方形网格中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783ed5dc278831e9f489373c0ffd588d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/d6675813-6d59-45d6-bde8-9f8fca3b12dc.png?resizew=557)
【思维拓展】
(3)如图4,若干个形状、大小完全相同的菱形组成网格,网格顶点称为格点,已知菱形的较小内角为60度,点A,B,C,D都在格点处,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8261a959647c9d6198897522c78819e5.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,
,
平分
,点B是射线
上一定点,点C在直线
上运动,连接
,将
(
)的两边射线
和
分别绕点B顺时针旋转
,旋转后角的两边分别与射线
交于点D和点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/967e1906-8ac4-40c8-a272-79ebfcd8e048.png?resizew=365)
(1)如图1,当点C在射线
上时,①请判断线段
与
的数量关系,写出结论并证明;②请探究线段
,
和
之间的数量关系,写出结论并证明;
(2)如图2,当点C在射线
的反向延长线上时,
交射线
于点F,若
,
,请直接写出线段
和
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3181e58f09e9fec4e43e422b82831b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c1b2c2a110c2cfd995d4e88817fce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/967e1906-8ac4-40c8-a272-79ebfcd8e048.png?resizew=365)
(1)如图1,当点C在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图2,当点C在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e240a6378adf6d23ebf9cc710c9bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次