如图,在
中,
,
,点D是线段
上的动点,将线段
绕点A顺时针旋转
至
,连接
.已知
,设
为
,
为
.小明根据学习函数的经验,对函数y随自变量x的变化而变化的规律进行了探究,下面是小明的探究过程,请补充完整.(说明:解答中所填数值均保留一位小数)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/dd7ef2b7-8e8a-4096-b3fc-9e9b89e0ddce.png?resizew=386)
(1)通过取点、画图、测量,得到了x与y的几组值,如下表:
(2)建立平面直角坐标系,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象.
(3)结合画出的函数图象,解决问题:线段
的长度的最小值约为
;若
,则
的长度x的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735bd70c2fa2bf51fd7aa448b20d0be1.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/2fb94bd9eb80fb9f5f02f518bb8f2211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc3dcc4325297dac77a92c0682a6cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc933c59790e1e90837c1ffe02f449f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/dd7ef2b7-8e8a-4096-b3fc-9e9b89e0ddce.png?resizew=386)
(1)通过取点、画图、测量,得到了x与y的几组值,如下表:
![]() | 0 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
(2)建立平面直角坐标系,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象.
(3)结合画出的函数图象,解决问题:线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142abe3cca2976ab024696ec20eeafc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
更新时间:2024-03-08 22:04:38
|
相似题推荐
解答题-作图题
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【推荐1】在“看图说故事”活动中,某学习小组根据《龟兔赛跑》的故事绘制了函数图象.
![](https://img.xkw.com/dksih/QBM/2023/5/29/3248262677159936/3248769945591808/STEM/546033212f2e48febf036b5d30a37563.png?resizew=380)
乌龟和兔子在笔直的公路上比赛,它们从同一地点同时出发后匀速向终点前进,兔子很快把乌龟远远甩在后头,骄傲自满的兔子觉得自己遥遥领先,就躺在路边呼呼大睡起来.当它一觉醒来,发现乌龟已经超过它,于是兔子加快速度追赶,最后还是输给了乌龟.图中的线段
和折线
分别表示乌龟和兔子的路程ym和时间x
之间的对应关系.
请根据相关信息,解答下列问题:
(1)填表:
(2)填空:
①赛跑中,兔子共睡了______
;
②乌龟追上兔子所用的时间为______
;
③兔子到达终点比乌龟晚了_______
;
④在比赛过程中,龟和兔最多相距________m.
(3)当
时,请直接写出兔子在赛跑过程y和x的函数解析式.
![](https://img.xkw.com/dksih/QBM/2023/5/29/3248262677159936/3248769945591808/STEM/546033212f2e48febf036b5d30a37563.png?resizew=380)
乌龟和兔子在笔直的公路上比赛,它们从同一地点同时出发后匀速向终点前进,兔子很快把乌龟远远甩在后头,骄傲自满的兔子觉得自己遥遥领先,就躺在路边呼呼大睡起来.当它一觉醒来,发现乌龟已经超过它,于是兔子加快速度追赶,最后还是输给了乌龟.图中的线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ce48eafd36547782174eb304d4a003.png)
请根据相关信息,解答下列问题:
(1)填表:
比赛时间 | 5 | 10 | 35 | 52 | 60 |
兔子所走的路程 | 200 | 550 |
①赛跑中,兔子共睡了______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ce48eafd36547782174eb304d4a003.png)
②乌龟追上兔子所用的时间为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ce48eafd36547782174eb304d4a003.png)
③兔子到达终点比乌龟晚了_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ce48eafd36547782174eb304d4a003.png)
④在比赛过程中,龟和兔最多相距________m.
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e51183e4c4e4b10e85117088123c5bf.png)
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【推荐2】探究通过维修路段的最短时长,素材1:如图1,某路段(
段)需要维修,临时变成双向交替通行,故在A,D处各设置红绿灯指导交通(仅设置红灯与绿灯).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/209b8fb2-603d-4337-8a30-d94982c1491b.png?resizew=281)
素材2:甲车先由
通行,乙车再由
通行,甲车经过AB,BC,CD段的时间分别为
,
,
,它的路程y(m)与时间t(s)的关系如图2所示;两车经过BC段的速度相等,乙车经过AB段的速度是
.
素材3:红绿灯1,2每114秒一个循环,每个循环内红灯、绿灯的时长如图3,且每次双向红灯时,已经进入AD段的车辆都能及时通过该路段.
![](https://img.xkw.com/dksih/QBM/2023/2/10/3171629678239744/3179567237455872/STEM/84b6954c84d94aa2a3d14a9c62d97870.png?resizew=550)
【任务1】求
段的总路程和甲车经过
段的速度.
【任务2】在图4中补全乙车通过维修路段时行驶的路程y(m)与时间t(s)之间的函数图像.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/aa07c7d1-0336-45b0-b1c5-009dd262df88.png?resizew=136)
【任务3】丙车沿
方向行驶,经
段的车速与乙车经过时的速度相同,在
段等红灯的车辆开始行驶后速度为
,等红灯时车流长度每秒增加
,问丙车在
段从开始等待至离开点A至少需要几秒钟?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6e4b232691562dc6ec2cd397f58809.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/209b8fb2-603d-4337-8a30-d94982c1491b.png?resizew=281)
素材2:甲车先由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f951a536cc785994e26d39407d20c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ed8ff962b116e2b6071e96abf8b4bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a165cec4c1b652bffb265e52e2334f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a165cec4c1b652bffb265e52e2334f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed7d5d42d86e25b08d046bc84ab85e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9117cc2ccde9e7e9fba69e89c54b78d.png)
素材3:红绿灯1,2每114秒一个循环,每个循环内红灯、绿灯的时长如图3,且每次双向红灯时,已经进入AD段的车辆都能及时通过该路段.
![](https://img.xkw.com/dksih/QBM/2023/2/10/3171629678239744/3179567237455872/STEM/84b6954c84d94aa2a3d14a9c62d97870.png?resizew=550)
【任务1】求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6e4b232691562dc6ec2cd397f58809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
【任务2】在图4中补全乙车通过维修路段时行驶的路程y(m)与时间t(s)之间的函数图像.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/aa07c7d1-0336-45b0-b1c5-009dd262df88.png?resizew=136)
【任务3】丙车沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53b8d0efaa15bbdd5bdb3817485bb75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e3cc7c707cfd4e8e26df1c69076638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
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【推荐3】在初中阶段的函数学习中,我们经历了列表、描点、连线画函数图象,并结合图象研究函数性质的过程,以下是我们研究函数
性质及其应用的部分过程,请按要求完成下列各小题.
(1)下表是
与
的几组值,请在表格的空白处填上恰当的数字.
(2)在平面直角坐标系中,补全描出表格中数据对应的各点,补全函数图象;
(3)观察函数
的图象,请写出该函数的一条性质;____________________.
(4)若方程
(
为常数)有三个实数解,则
的取值范围为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927670fbdc33fac6a41383543ea95531.png)
(1)下表是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | … | ![]() | ![]() | ![]() | ![]() | ![]() | 1 | 3 | 4 | 5 | … | |
![]() | … | ![]() | ![]() | ![]() | ![]() | ![]() | 0 | 4 | ![]() | … |
(3)观察函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927670fbdc33fac6a41383543ea95531.png)
(4)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b3e793e53960ce10ed058672753d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/12/8/2609804464373760/2621687035535360/STEM/e1799539-5e40-47a5-803d-e3e7ce8b1245.png?resizew=274)
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【推荐1】探究函数性质时,我们经历了列表、描点、连线画出函数图象,观察分析函数特征,概括函数性质的过程,已知函数
,结合已有的学习经验,完成下列各小题.
(1)请在下列表格空白处填入恰当的数据:
(2)根据上表中的数据,在所给的平面直角坐标系中补全函数
的图象;
(3)根据你所画的该函数图象,写出该函数所具有的一条性质______;
(4)结合你所画的函数图象,直接写出方程
的近似解为:______(结果保留一位小数,误差不超过0.2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ef0edc358ecdb66e6d8ac4cf94e651.png)
(1)请在下列表格空白处填入恰当的数据:
… | -5 | -2 | -1 | 0 | 0.5 | 1.5 | 4 | 7 | … | |||
… | 2 | 1 | 0 | 3 | 9 | 3 | 1 | 2 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ef0edc358ecdb66e6d8ac4cf94e651.png)
(3)根据你所画的该函数图象,写出该函数所具有的一条性质______;
(4)结合你所画的函数图象,直接写出方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7265cfd2ee5047a73c9b91a24e9d7172.png)
![](https://img.xkw.com/dksih/QBM/2021/1/8/2631582047895552/2634384795312128/STEM/55fcde5e-5ac2-48c5-9f1f-1a4b60171021.png?resizew=251)
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【推荐2】已知函数
.在探究二次函数相关性质时,我们需要借助图像:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/53a84ade-7eef-4bc6-bff7-676e6d33924a.png?resizew=253)
(1)画图:请完成下列步骤并写出函数图像的性质:
①列表:
②描点;
③连线;
其中
________,
________,函数图像的性质:________.(写出一条即可)
(2)当
时,求
的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa990b6bed988fb1fe1487aa2a7d85f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/53a84ade-7eef-4bc6-bff7-676e6d33924a.png?resizew=253)
(1)画图:请完成下列步骤并写出函数图像的性质:
①列表:
③连线;
其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b0342e85dde32b333688516f595180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐1】在平面直角坐标系中,点
在y轴正半轴上,直线l平分坐标系的第二、四象限,点B是直线l上一动点.
最短时,点B的坐标为________;(结果均用a表示)
(2)如图2,当
轴,且垂足为点A时,以
为边作正方形
,M在x轴的正半轴,且
,以
为边在x轴上方作正方形
,连接
,若
,两个正方形面积之和为20,求
的面积;
(3)如图3,当
轴,且垂足为点A时,点F在线段
上运动(不与端点重合),点C是线段
的中点,连接
,以A为直角顶点,
为直角边在第二象限内作等腰
,连接
,交
于点G,探究线段
与
的关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8da179d60dd9ec6ece6de442ae1b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ea84cba8ccd585ad1da1fd204bc3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4c18d2e9b719fb0b7bdf5162c1ef6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40a1e961ba3603c64107fb556db6c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ea1231c33f1357206dff422d7cf0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa69c6f2206f7ab12cb1358d5b19c6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bd01cd837bc582032269ea383200b1.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ea84cba8ccd585ad1da1fd204bc3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2a74cd3134a825d7924a01c8e633ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636a1313a0ba873f9d5e4f67beec21d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐2】(1)阅读理解:如图1,在△ABC中,若AB=10,BC=8,求AC边上的中线BD的取值范围.小聪同学是这样思考的:延长BD至E,使DE=BD,连结CE.利用全等将边AB转化到CE,在△BCE中利用三角形三边关系即可求出中线BD的取值范围.在这个过程中小聪同学证三角形全等用到的判定方法是 ;中线BD的取值范围是 .
(2)问题解决:如图2,在△ABC中,点D是AC的中点,点M在AB边上,点N在BC边上,若DM⊥DN,求证:AM+CN>MN.
(3)问题拓展:如图3,在△ABC中,点D是AC的中点,分别以AB,BC为直角边向△ABC外作等腰直角三角形ABM和等腰直角三角形BCN,其中∠ABM=∠NBC=90°,连接MN,探索BD与MN的关系,并说明理由.
(2)问题解决:如图2,在△ABC中,点D是AC的中点,点M在AB边上,点N在BC边上,若DM⊥DN,求证:AM+CN>MN.
(3)问题拓展:如图3,在△ABC中,点D是AC的中点,分别以AB,BC为直角边向△ABC外作等腰直角三角形ABM和等腰直角三角形BCN,其中∠ABM=∠NBC=90°,连接MN,探索BD与MN的关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/a68ea367-d6b5-44ea-86f7-8508742b7978.png?resizew=488)
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解答题-问答题
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较难
(0.4)
【推荐1】如图1,在钢管的两侧分别放置三角形垫块
可以将钢管架在水平面
上方.钢管的底面截面如图中
所示,
与两个垫块分别相切于点K.C,垫块.
和点K的位置不变,点C的位置随
的度数的改变而变化,且始终保持圆心O到水平面
的距离不变,设
当点A,B重合时,点B到达了最左端的位置,已知.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c60167c8ca78d5f7fa83db94d7b46c.png)
的半径为4.
在K,C之间的劣弧
长为
求α的度数;
(2)当点K,C到水平面
的竖直高度一样时,求点A,B之间的距离;
(3)当点A,B重合时,如图2,求点C到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f846a9eda0b167550370aeeaff16fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/b66eae532e1a1551cfc7b5ff9cfc5aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734345e059b7ce588a4f4a4dfd61dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55943cc7350cc45fbb36890b9664b4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c6968f213cc5752f113927b20fc780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c60167c8ca78d5f7fa83db94d7b46c.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/ac621990a2eb8a34b29c42d3d03d1e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7db3703bb39795b22b6218629ee57d7.png)
(2)当点K,C到水平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)当点A,B重合时,如图2,求点C到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐2】综合与实践课上,同学们以“矩形的折叠”为主题开展数学活动.
操作一:对折矩形纸片
,使
与
重合,得到折痕
,把纸片展平;
操作二:在
上选一点
,沿
折叠,使点
落在矩形内部点
处,把纸片展平,连接
,
.
根据以上操作,当点
在
上时,写出图1中一个
的角: .
(2)迁移探究
小华将矩形纸片换成边长为
的正方形纸片,继续探究,过程如下:
将正方形纸片
按照(1) 中的方式操作,延长
交
于点Q,连接
.
①如图2, 当点M在
上时, 求
的度数.
②请同学们在图2中连接
,交
于点N.分别求出
和
的长.
(3)拓展应用
如图3,改变点P在
上的位置(点P不与点A,D重合),正方形纸片
的边长仍然为
, 仍然按照(1)中的方式操作, 延长
交
于点Q,连接
.当
时,直接写出
的长.
操作一:对折矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
操作二:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
根据以上操作,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
(2)迁移探究
小华将矩形纸片换成边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf58fc46f453aac3b33f76c8e3545a20.png)
将正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
①如图2, 当点M在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cd4848ce65d25d3bb30a725322ca8f.png)
②请同学们在图2中连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
(3)拓展应用
如图3,改变点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d38b6ffa12604d9a9f8f9dc4d1135b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f683a544ec78c16f9e2175e4923c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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