1 . 矩形
中,
,
,将矩形折叠,使点A落在点P处,折痕为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/3fe4a135-a170-4633-9ab1-dc2b7c6a7aea.jpg?resizew=309)
(1)观察发现:如图1,若点P恰好在边
上,
________(填写一个与
相似的三角形);
(2)拓展探究:如图1,若点P恰好在边
上,则线段
的长为________.
(3)迁移应用:如图2,若E是
的中点,
的延长线交
于点F,其余条件不变,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdf82f2b3ac77ee7b9b35aebe0dd83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/3fe4a135-a170-4633-9ab1-dc2b7c6a7aea.jpg?resizew=309)
(1)观察发现:如图1,若点P恰好在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4017202addef8e8a016ba3373d1cf926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48775f13f05443e6f6d30ae26e669f5.png)
(2)拓展探究:如图1,若点P恰好在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)迁移应用:如图2,若E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
您最近一年使用:0次
名校
解题方法
2 . 如图1,在
中,
,
,点
、
分别是边
、
上的点,且
,将
绕点
按顺时针方向旋转,记旋转角为
.
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575847163789312/2576330636451840/STEM/22802a5e43df4bf1a22250e0a54afc68.png?resizew=195)
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575847163789312/2576330636451840/STEM/ef11e5e790b14004a6d60a13ab79cba6.png?resizew=195)
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575847163789312/2576330636451840/STEM/5d171d9c68c24d1f824401ac851bc6e7.png?resizew=180)
(1)问题发现:如图1,当
时,
________;
(2)拓展探究:试判断:当
时,
的大小有无变化?请仅就图2的情形给出证明;
(3)问题解决:若
为
内一点,且
,请直接写出线段
、
、
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f149e83812e72efd7dd3dfc78d0134ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f4bcb7ddcdbb66f0304d0531e84c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/dd5f2480cca3544103abb5f6a29b4554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575847163789312/2576330636451840/STEM/22802a5e43df4bf1a22250e0a54afc68.png?resizew=195)
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575847163789312/2576330636451840/STEM/ef11e5e790b14004a6d60a13ab79cba6.png?resizew=195)
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575847163789312/2576330636451840/STEM/5d171d9c68c24d1f824401ac851bc6e7.png?resizew=180)
(1)问题发现:如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6c149a5bccb793dd3014691896e414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787f35ca2d29a1cebb5c98c488b723b7.png)
(2)拓展探究:试判断:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de68f4f738ecd4e153c9f480c8f040b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1682a8242948cc1d76eddef3e50836f.png)
(3)问题解决:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d0c6f6c7fce47f41d562abcb6c6c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次
解题方法
3 . 【提出问题】
(1)已知:菱形ABCD的边长为6,
,
为等边三角形,当点P与点D重合,点E在对角线AC上时(如图1所示),求
的值.
【类比探究】
(2)在上面的问题中,如果把点P沿DA方向移动,使
,其余条件不变(如图2),求
的值;
【拓展迁移】
(3)在原问题中,当点P在线段DA的延长线上,点E在CA的延长线上时(如图3),设
,请直接写出线段AE、AF的长与m有怎样的数量关系.
(1)已知:菱形ABCD的边长为6,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577250c86a14c7a2990bf9852c7213d5.png)
【类比探究】
(2)在上面的问题中,如果把点P沿DA方向移动,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577250c86a14c7a2990bf9852c7213d5.png)
【拓展迁移】
(3)在原问题中,当点P在线段DA的延长线上,点E在CA的延长线上时(如图3),设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbd4869dbffe2c1d53ab6b2494de547.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/bc34254e-1ee5-450d-8b61-610037a0cf41.png?resizew=452)
您最近一年使用:0次
解题方法
4 . 在
中,
,经过点B的直线l(l不与直线
重合)与直线
的夹角等于
,分别过点C、A作直线l的垂线,垂足分别为点D、E.
(1)问题发现:
①若
,如图①,则
________;
②若
,如图②,则
________;
(2)拓展探究:当
时,
的值有无变化?请仅就图③的情形给出证明;
(3)问题解决:若直线
、
交于点F,
,
,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(1)问题发现:
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787f35ca2d29a1cebb5c98c488b723b7.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787f35ca2d29a1cebb5c98c488b723b7.png)
(2)拓展探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c328690bedf40f97f00359b316ddbda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1682a8242948cc1d76eddef3e50836f.png)
(3)问题解决:若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f482a3c73fc7eb87b611702e6fe2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/515c6b00-6e55-44d9-994c-67f4577873ca.png?resizew=343)
您最近一年使用:0次
2020-06-04更新
|
71次组卷
|
5卷引用:2016届河南省中考定心模拟数学试卷
2016届河南省中考定心模拟数学试卷(已下线)【万唯原创】2016年份河南省中考数学定心卷-普通高中招生考试定心卷(已下线)【万唯原创】2017年河南省中考数学逆袭卷-逆袭诊断卷(已下线)【万唯原创】河南省2020年中考数学-逆袭卷-特训22-23江苏省靖江市外国语学校2018-2019学年第一学期九年级上期中数学试题
真题
名校
5 . (1)证明推断:如图(1),在正方形
中,点
,
分别在边
,
上,
于点
,点
,
分别在边
,
上,
.
①求证:
;
②推断:
的值为 ;
(2)类比探究:如图(2),在矩形
中,
(
为常数).将矩形
沿
折叠,使点
落在
边上的点
处,得到四边形
,
交
于点
,连接
交
于点
.试探究
与
之间的数量关系,并说明理由;
(3)拓展应用:在(2)的条件下,连接
,当
时,若
,
,求
的长.
![](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/acc290b44635265137fdf13146b6a6d9.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/8681dc7b0483bb527802389b03129b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bbdea60708bebc259452cc5e07ea5a.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e6ecc67e184645d2cde587f8aa8f76.png)
②推断:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f12d3876f1b0ffaf9179fb85c0e683.png)
(2)类比探究:如图(2),在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714c979d980d5377a6cc93a452bffe8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19191ca20cae3123d7df1b3a2ec5a857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)拓展应用:在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d71107894329b293117036013dcbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2f30860874820bca1a0a62d28f2095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e6edb9dbe91787f764cf056bbfa8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/cfbf55e6-36da-4181-b6d0-663a0a4a0c43.png?resizew=261)
您最近一年使用:0次
2019-07-26更新
|
1698次组卷
|
12卷引用:【万唯原创】2020年河南省中考数学试题-河南试题正文-第二部分重难题型3
(已下线)【万唯原创】2020年河南省中考数学试题-河南试题正文-第二部分重难题型32023年河南省南阳市淅川县中考一模数学试题(已下线)2023年河南省一模(几何综合2)湖北省襄阳市2019年中考数学试题2020年四川省成都七中万达学校中考数学三模试题2020年湖南省岳阳市中考一模数学试题2021年安徽省滁州市定远县中考一模数学试题浙江省宁波市鄞州区九校联考2021-2022学年九年级下学期月考数学试题(一模)2022年浙江省衢州市柯城区九年级第二次模拟考试数学试题2022年广东省珠海市梅华中学中考三模数学试题广东省深圳市北师大南山附属学校中学部2023-2024学年九年级下学期开学考数学试题山东省初中毕业年级2024年数学模拟预测题
6 . 某学习小组在探究三角形相似时,发现了下面这种典型的基本图形.
(1)如图 1,在
中,
直线 l 经过点A,BD⊥直线 l,CE⊥直线l,垂足分别为 D、E.求证: ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582b877b3bb0832d63e7c49539fb5f20.png)
(2)组员小刘想,如果三个角都不是直角,那么结论是否仍然成立呢? 如图2,将(1)中的条件做以下修改:在
中,
D、A、E 三点都在直线l 上,并且有
,其中α为任意锐角或钝角.请问(1)中的结论还成立吗? 若成立,请你给出证明;若不成立,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/d0b7fbda-8b66-42c1-b7a4-89aa0e31a951.png?resizew=387)
(1)如图 1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3ead986ff3f0f131bbb3d9298a4be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582b877b3bb0832d63e7c49539fb5f20.png)
(2)组员小刘想,如果三个角都不是直角,那么结论是否仍然成立呢? 如图2,将(1)中的条件做以下修改:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3fea049c8f5bf18d0aa9f58130201ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcffbab6171e2026b966e73e2b7f95e.png)
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7 . 如图,P为⊙O的直径AB上的一个动点,点C在
上,连接PC,过点A作PC的垂线交⊙O于点Q.已知AB=5cm,AC=3cm.设A、P两点间的距离为xcm,A、Q两点间的距离为ycm.某同学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探究.下面是该同学的探究过程,请补充完整:
(1)通过取点、画图、测量及分析,得到了x与y的几组值,如下表:
(说明:补全表格对的相关数值保留一位小数)
(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:当AQ=2AP时,AP的长度均为 cm.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
(1)通过取点、画图、测量及分析,得到了x与y的几组值,如下表:
x(cm) | 0 | 2.5 | 3.5 | 4 | 5 | |||
y(cm) | 4.0 | 4.7 | 5.0 | 4.8 | 4.1 | 3.7 |
(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:当AQ=2AP时,AP的长度均为 cm.
![](https://img.xkw.com/dksih/QBM/2021/4/27/2708907405901824/2709386884399104/STEM/63f8ee89-237c-4d32-8f18-970806f09708.png?resizew=152)
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真题
8 . 综合与探究
如图,抛物线
与
轴交于
,
两点(点
在点
的左侧),与
轴交于点
.直线
与抛物线交于
,
两点,与
轴交于点
,点
的坐标为
.
(1)请直接写出
,
两点的坐标及直线
的函数表达式;
(2)若点
是抛物线上的点,点
的横坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
,过点
作
轴,垂足为
.
与直线
交于点
,当点
是线段
的三等分点时,求点
的坐标;
(3)若点
是
轴上的点,且
,求点
的坐标.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0116aca690b431a7b75627d8464e2260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e8636a2a9c4b3d588a9d29f24ec0ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/628a1ef3-220e-4346-853a-c44001eb4bef.png?resizew=200)
(1)请直接写出
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa285d6315acde3803d19954edd40bc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7b33b3e2dbfe5e4175757fd7053469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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2020-07-24更新
|
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|
19卷引用:必刷卷05-2021年中考数学考前信息必刷卷(河南专用)
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2010·云南昆明·中考真题
真题
9 . 已知:如图,在梯形ABCD中,AD∥BC,∠DCB = 90°,E是AD的中点,点P是BC边上的动点(不与点B重合),EP与BD相交于点O.
![](https://img.xkw.com/dksih/QBM/2011/10/14/1573262243381248/1573262298185728/STEM/44d1c8ed-d6fe-40f0-85f6-133dc9e7b36d.png?resizew=301)
(1)当P点在BC边上运动时,求证:△BOP∽△DOE;
(2)设(1)中的相似比为
,若AD︰BC = 2︰3. 请探究:当k为下列三种情况时,四边形ABPE是什么四边形?①当
= 1时,是______ ;②当
= 2时,是______ ;③当
= 3时,是______ . 并证明
= 2时的结论.
![](https://img.xkw.com/dksih/QBM/2011/10/14/1573262243381248/1573262298185728/STEM/44d1c8ed-d6fe-40f0-85f6-133dc9e7b36d.png?resizew=301)
(1)当P点在BC边上运动时,求证:△BOP∽△DOE;
(2)设(1)中的相似比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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