如图1,有等边
和等边
,将
绕点A顺时针旋转,得到图2所示的图形.
(1)求证:
;
(2)如图3,若
,
,且旋转角为
时,求
的度数;
(3)如图4,连接
,并延长
交
于点F,若
旋转至某一位置时,恰有
,
,求
的值.
![](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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/d8e17488-059a-46a7-84bf-94018e86abdf.png?resizew=458)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684d2bbdd30443a7b73738d051d9a5dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e219b4b74587a077f223fec499bace9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
(3)如图4,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dfa223e7b272346649538457c976864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f692d0437e200690eabcd84ebcfa8a9.png)
2023九年级·全国·专题练习 查看更多[1]
(已下线)第23单元03巩固练
更新时间:2023-07-26 14:27:12
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相似题推荐
解答题-问答题
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【推荐1】数学是一门充满乐趣、奥妙、又极具探索的学科,对一个人的思维也是一种“挑战”.几何图形更是变幻无穷,但只要我们借助图形的直观、特殊情形出发,逐步“从特殊到一般”进行探索,思路和方法自然就会显现出来.下面是一道探索几何图形中
大小的例子.
(1)【特例探究】
如图①,在等边
中,点D,E分别是线段
上的点,且
,
与
交于点
猜想:
______
(选填“
”、“
”或“
”),
______ 度;
(2)【问题推广】
如图②,在等边
中,若点D,E分别在
的延长线上,且
,猜想
的度数,并给出证明.
(3)【拓展延伸】
如图③,在等腰
中,
,
是锐角,点O在
上且
,点D,E分别在
的延长线上,
,
与
的延长线交于点F,若
,则
______ 度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/f852b873-0382-49cb-8b3e-641201c6863c.png?resizew=414)
(1)【特例探究】
如图①,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9a415bdb7b4e1e35c18a9e53205392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5704eac867e33aaefd43da48b0f222f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72d241dec20c547340d22924a818fa1.png)
(2)【问题推广】
如图②,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6c6203b1544957dff64a0c045a2760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
(3)【拓展延伸】
如图③,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fcbbf41ad54238d066c1e435c50876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a6574405000dab3fec93b438aa2de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66157f9af3434ffd0cebb5d3e5365da7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72d241dec20c547340d22924a818fa1.png)
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【推荐2】(1)问题提出:如图①,在Rt△ABC中,∠A=90°,∠B=30°,BC=8,则AB= ;
(2)问题解决:如图②,某社区有一块六边形空地ABCDEF,其中AF=CD,EF=ED,∠BAF=105°,∠FED=120°,∠BCD=135°,连接AE,CE后发现四边形ABCE为长方形,该社区计划将长方形ABCE内部作为休闲广场区域,△AEF和△ECD内部作为绿化区域,设AE的长为x(m),CE的长为y(m).
①求y与x之间的函数关系;
②若x=100m,求绿化区域的面积(△AEF和△ECD的面积之和,结果不取近似值)
(2)问题解决:如图②,某社区有一块六边形空地ABCDEF,其中AF=CD,EF=ED,∠BAF=105°,∠FED=120°,∠BCD=135°,连接AE,CE后发现四边形ABCE为长方形,该社区计划将长方形ABCE内部作为休闲广场区域,△AEF和△ECD内部作为绿化区域,设AE的长为x(m),CE的长为y(m).
①求y与x之间的函数关系;
②若x=100m,求绿化区域的面积(△AEF和△ECD的面积之和,结果不取近似值)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/04a39ee9-3a21-4388-a71e-ebafd5fb447f.png?resizew=339)
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名校
【推荐1】在等腰
中,
,
,点
、
分别在
、
上,将线段
绕点
顺时针旋转
得到线段
,连接
、
,
交
于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)如图1,若点
为
中点,
,
,求
的长;
(2)如图2,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
(2)如图2,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fae89e7b78fd35f0f91769896b618dd.png)
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648777526247424/2680359628800000/STEM/3ec997e1-3340-4f99-8642-9caf914882be.png?resizew=362)
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名校
【推荐2】在
中,
.
(1)如图1,在
边上找一点E,连接
,使得
,过点B作
的垂线交
延长线于点G,延长
,
交于点D.若
,求
的长度;
(2)如图2,在
内部找一点E,连接
,将
绕点E旋转至
交
于点O,使得
,连接
,取
的中点D,连接
.求证:
;
(3)如图3,在(2)问的条件下,若
,且
,
交
于点R,点P为线段
上一动点,连接
,将线段
绕着R点顺时针方向旋转
,得到线段
,连接
.当线段
长度最小时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774b858b803a51d26a3d9ed0c0cd5568.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/ad3efeea-79b6-4557-955e-19751c76402a.png?resizew=464)
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c1cda81b95f5669e7f6cbae11965b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999a995a6d07c561ce64e8952994160a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337421403f59eb20bdc8b446691f8a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fca2751538dbcc41c096e19fe51199c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bfa1d65fd7acdd6e04f33f9af53e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ab27b6e809a6e8f73b25736b367c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e28b1d2c98a8e3c2250254f20fa00c5.png)
(3)如图3,在(2)问的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde41c158871900cd88084c42a648139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a151238d6529544e2efdfe910ad029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10d8812b56908a94b84fdb0f35bf82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b571a0fd8808243d4aac831c6ffc6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8d447a867fca2de04222a72885b659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128147bd4834566a78b4e9d2a3b2139c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128147bd4834566a78b4e9d2a3b2139c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83b2930ad2a94287b66f9603c1636c9.png)
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【推荐1】如图,在
中,
,
,
.点
从点
出发,以
的速度沿
向终点
匀速移动.过点
作
,垂足为点
,以
为边作正方形
,点
在
边上,连接
.设点
移动的时间为
..
;(用含t的代数式表示)
(2)当点C,N,M在同一条直线上时,求出相应的t的值;
(3)当
为等腰三角形时,求t的值.
![](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/09742010b409a7eedbafe316da26df1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8b56aed4db66a0f498bb0cbe1d6c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c317a2e011d24dba118a3d80f799bd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecd76012d1b9c5e9fec6221e6e489c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7330af1eaa4fbb442ebc7b47be6b6d7a.png)
(2)当点C,N,M在同一条直线上时,求出相应的t的值;
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec71f16aa557d420d6286b7747b2cb05.png)
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【推荐2】如图1,在
中,
,
,点D、E分别在边AC、AB上,
,连接DE.将
绕点A顺时针方向旋转,记旋转角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/512275a4-7a2d-4d5b-ba94-563326193cb1.png?resizew=555)
(1)[问题发现]①当
时,
____________;
②当
时,
____________;
(2)[拓展研究]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]当
旋转至B、D、E三点共线时,线段CD的长为_____________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46de792a9388bc13e70dc28eeab60405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ceb3cc7e4c368c7b13a65d463f3c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/512275a4-7a2d-4d5b-ba94-563326193cb1.png?resizew=555)
(1)[问题发现]①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469451242301adbf795110cbb9154403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc00342101809b43c1c3187dc0d06f9b.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31cb3cc93e355ace2adee68be0a068f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc00342101809b43c1c3187dc0d06f9b.png)
(2)[拓展研究]试判断:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ebd2af5891ccfe9c9b667c099f6006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1672bf7cfa9a741651889f41855f6f3b.png)
(3)[问题解决]当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】综合与实践
问题情境:数学活动课上,王老师出示了一个问题:
如图1,在
中,
是
边的中线,延长
至点D,连接
,且
.求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/26aac397-e820-434a-b823-eaea4e6a617d.png?resizew=480)
(1)独立思考:请解答王老师提出的问题.
(2)实践探究:在原有问题条件不变的情况下,王老师增加下面的条件,并提出新问题,请你解答.
“如图2,F是
边的中点,连接
,将
绕点E顺时针旋转一定角度,交
于点M,交
于点N.在图中找出与
相等的线段,并证明.”
(3)问题解决:数学活动小组同学对上述问题进行特殊化研究之后发现,当射线EM经过点D时,若给出
的边长,则图3中所有已经用字母标记的线段长均可求.该小组提出下面的问题,请你解答.
“如图3,在(2)的条件下,当射线
经过点D时,
,求
的长.”
问题情境:数学活动课上,王老师出示了一个问题:
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fca376d53ebc6d1355fd8bb4a84405.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cb302034aaafb4657073cc6fcb0992.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/26aac397-e820-434a-b823-eaea4e6a617d.png?resizew=480)
(1)独立思考:请解答王老师提出的问题.
(2)实践探究:在原有问题条件不变的情况下,王老师增加下面的条件,并提出新问题,请你解答.
“如图2,F是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(3)问题解决:数学活动小组同学对上述问题进行特殊化研究之后发现,当射线EM经过点D时,若给出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8237e12e3e46a7383df36a56e2d3a31.png)
“如图3,在(2)的条件下,当射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2e0a4ba89eed26d2ce637e1a4fcc17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,将边长为3的正方形
置于平面直角坐标系第一象限,使边
落在
轴的正半轴上,直线
:
经过点
且与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/b49fc6db-fa28-4c98-823b-f995e2e87533.png?resizew=156)
(1)求
点坐标;
(2)求
的面积;
(3)若直线
与
轴交于点
,在
轴上是否存在点
,使得
是直角三角形?若存在,请直接写出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abfdd1e8e9a16c04d58ee0cc3382192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/b49fc6db-fa28-4c98-823b-f995e2e87533.png?resizew=156)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6818a98204f62c1b16699d26ca0c3f62.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a249a8e9d62fe47cbf2b6fc73824d5fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次