在等腰直角
中,
,D是线段
上一点,延长
至点E,使得
,过点E作
于点G,交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/49adb7d8-917e-46cd-8fba-9eb0fb842b75.png?resizew=333)
(1)如图1,连接
,若
平分
,
,求
的长;
(2)如图2,H是平面内一点,连接
、
,
平分
,
,用等式表示线段
、
、
之间的数量关系,并证明;
(3)如图3,在第(2)问的条件下,
,
,点M为平面内一点,连接
、
,满足
,当
最小时,将
沿着
翻折到同一平面内得
,过点E作
,交直线
于点K,直接写出线段
的长度.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082292e52d5b734762cf9c139ee550bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/49adb7d8-917e-46cd-8fba-9eb0fb842b75.png?resizew=333)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6f6c04bc017ced739230d14ba31948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,H是平面内一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19e5d3cf401b3361e85a96493904b38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b518bff3382437818bf9df49e49ab236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
(3)如图3,在第(2)问的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03359b2f694eb1e9e41f316af43c439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a1219bc313db46b07bbd68600267a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7200ac6d0c365d7a6222565877ca9a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385aaffd3fd3081885e590116a289be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d42a692432a3ddb16b8057af17a162d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64c372f6162c32675bfc005cffa6956.png)
23-24九年级上·全国·期末 查看更多[1]
(已下线)猜想04与圆相关的几何综合(6种模型)-2023-2024学年九年级数学上学期期末考点大串讲(人教版)
更新时间:2024-01-21 21:12:30
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】已知,矩形
中,
,
,点
是
边上一点,点
是
或
边上一点,沿着
折叠,点
落在点
处,连接
,
交于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729213255352320/2741224729624576/STEM/7f26d9bb-e778-4eb2-8083-71f1ebbd9937.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729213255352320/2741224729624576/STEM/28ff91e1-2e5c-4181-824e-c6ae5965d865.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729213255352320/2741224729624576/STEM/515a7946-91df-4472-a016-ec6887f6d5c2.png)
(1)如图1,若点
,点
都在
边上,连接
,求证:四边形
是菱形;
(2)如图2,若点
在
边上,点
落在
边上,
,求
的长;
(3)如图3,若点
在
边上,
,当点
落在矩形
内部,连接
,
,求四边形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.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/dad2a36927223bd70f426ba06aea4b45.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/e430f13f42cf2d44aa0f0e20b959684f.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729213255352320/2741224729624576/STEM/7f26d9bb-e778-4eb2-8083-71f1ebbd9937.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729213255352320/2741224729624576/STEM/28ff91e1-2e5c-4181-824e-c6ae5965d865.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729213255352320/2741224729624576/STEM/515a7946-91df-4472-a016-ec6887f6d5c2.png)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493f118c790556fb9194c1230bee27d7.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f020051f12188f88c4ab785234f60bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(3)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602ee324ca5bc3cf9ef251a061b431ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知在等腰
中,
,D为
中点,连接
.分别以A、B为圆心,大于
的长为半径画弧,在
的两侧分别交于点M、N,连接
,
交
于点
,交
于点
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/65955c27-229c-4662-beec-91474a347421.png?resizew=576)
(1)如图1,若
为正三角形,则
__________;
__________.
(2)如图2,若
,
的延长线交
于点P,求
的值和
的长.
(3)如图3,若
,把图2中的
绕着点A旋转,直接写出
的值,以及
的最小值和最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/65955c27-229c-4662-beec-91474a347421.png?resizew=576)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b1bda34f3a04c19d5bf5f3155b6187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b99a9c347f3fa6260ff44f101fe341.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341e8dae00f6b2abc94199ccfd6cf180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9dd3eb92632547fd293c13cbbee4ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341e8dae00f6b2abc94199ccfd6cf180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9dd3eb92632547fd293c13cbbee4ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知:在梯形
中,
,
,
,点
在对角线
上(不与点
重合),
,
的延长线与射线
交于点
,设
的长为
.
(1)如图,当
时,求
的长;
(2)设
的长为
,求
关于
的函数解析式,并直接写出定义域;
(3)当
是等腰三角形时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/487edcf3d866ab0a89edb1b83e8153fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaff9d8a32b49bb7b422ec482ae3f2ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e478787ebfeb68a5a7594dbd9eecd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0b1653399bd22092173087269662ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.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/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a37ba261860ddad9d11b2e8348a8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2020/3/22/2424849627578368/2425087321325568/STEM/c71ca8c48d9d47b48c00899db738f4a0.png?resizew=270)
![](https://img.xkw.com/dksih/QBM/2020/3/22/2424849627578368/2425087321325568/STEM/0807901d4f7541eb85ebed046842631f.png?resizew=249)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】(1)如图1,
和
均为等边三角形,直线
和直线
交于点F.填空:
①线段
,
之间的数量关系为________;②
的度数为______.
(2)如图2所示,
和
均为等腰直角三角形,
,直线
和直线
交于点F,请判断
的度数及线段
,
之间的数量关系,并说明理由.
(3)如图3所示,
和
均为直角三角形,
,
,当点B在线段
的延长线上时,求线段
和
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
①线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36719f1e764ee0e719b65c49fae84677.png)
(2)如图2所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdd5e52d9c263345ac57ebf19d909fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36719f1e764ee0e719b65c49fae84677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)如图3所示,
![](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/bac381c834e84a6c27d7e7eac9773014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4bf0ee01b6d77c835dab051432c9993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/fb5a447a-4628-4201-b7ff-530d1e1ceb5a.png?resizew=429)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在△AOB中,∠AOB=90°,AO=6,BO=6
,以点O为圆心,以2为半径作优弧
,交AO于点D,交BO于点E.点M在优弧
上从点D开始移动,到达点E时停止,连接AM.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/6235f542-aaab-469a-935e-621f0dab614a.png?resizew=357)
(1)当AM=4
时,判断AM与优弧
的位置关系,并加以证明;
(2)当MO
AB时,求点M在优弧
上移动的路线长及线段AM的长;
(3)连接BM,设△ABM的面积为S,直接写出S的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/6235f542-aaab-469a-935e-621f0dab614a.png?resizew=357)
(1)当AM=4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
(2)当MO
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
(3)连接BM,设△ABM的面积为S,直接写出S的取值范围.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】小明在数学学习中遇到了这样一个问题:“如图1,在
中,
,点P在
边上,过点P作
于点Q,O为
边的中点,连接
并延长到点M,使
,连接
.请你帮他探究:
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988366886395904/2989671606001664/STEM/617c652b-51a4-43b4-9010-fe83e4a0e3ab.png?resizew=758)
特例探究:
(1)填空:如图1,当
时,
____________;
(2)证明:如图2,当
时,将
绕点A逆时针方向旋转,连接
,线段
,
之间的数量关系如何?请仅就图2所示情况说明理由.
应用探究:
(3)在(2)的条件下,在
中,若
,将
由初始位置绕点A逆时针方向旋转
角
,当点Q到直线
的距离为4时,请直接写出线段
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f304a716fd35979027a74d23196f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b154270249b0ef54ddb26137b2681a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a187f0d36def464baefc8919ce24c20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988366886395904/2989671606001664/STEM/617c652b-51a4-43b4-9010-fe83e4a0e3ab.png?resizew=758)
特例探究:
(1)填空:如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4454db6f3679422f5506c506e20e9e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b2123ec916f14491cdbe2d7ef3399d.png)
(2)证明:如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c23c5a9d0f0ac95c94f6319b6bd553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
应用探究:
(3)在(2)的条件下,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf4ae1eb757d8dd0997db346518e07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6397b8d0a25df43d4e60b29a3b90c12e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
您最近一年使用:0次