1 . 如图,在正方形
中,
,
,
相交于点
,
、
分别是边
、
上的动点 (点
、
不与线段
、
的端点重合),
,连接
,
,
.在点
、
运动的过程中,有下列四个结论:①
始终是等腰直角三角形;②
面积的最小值是
;③四边形
的面积始终是
;④至少存在一个
,使得
的周长是
;所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc869125145c0139d92490a41bd3918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc869125145c0139d92490a41bd3918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e689223dbda856ab0898b0010ffb86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e5a933a2a0ff3a28009cc989293ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e5a933a2a0ff3a28009cc989293ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ea0cba2d06283fae3d864a2329e0.png)
A.①③④ | B.①②③ | C.①②③④ | D.②③④ |
您最近一年使用:0次
2023-09-12更新
|
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|
4卷引用:陕西省西安市经开第二学校2023-2024学年九年级上学期第一次月考数学试题
陕西省西安市经开第二学校2023-2024学年九年级上学期第一次月考数学试题贵州省安顺市普定县某校2022-2023学年八年级下学期期中数学试题(已下线)考题猜想06 八年级期中必刷题(压轴必刷48题13种题型)-2023-2024学年八年级数学下学期期中考点大串讲(苏科版)(已下线)考题猜想6-1二次根式、勾股定理、平行四边形、一次函数中数形结合思想的巧用(11种类型)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)
2 . 正方形
中,
为对角线
上的动点(不于
、
重合),连接
,
,作
交
或其延长线于
,下列结论:①
;②
为等腰三角形;③
;④
,其中正确结论的序号是____________
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3a3137299ffaea0545cd45323f1af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba11242dcc61d3c7c3555b598b5fdc89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806cfba0ded194c681f374be3bb98da0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/80790218-cb7a-403d-8dd0-7f47eab16662.png?resizew=160)
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3 . 如图,在正方形
中,
,E为对角线
上与A,C不重合的一个动点,过点E作
于点F,
于点G,连接
,下列结论:①
;②
;③
;④
的最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
________ .其中正确结论的有.(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97800c18069cc979133f4d4c865ff163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c369f94a6056d114f95432968a7e666f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34da0bafac21a66f7e5d3e42aba8e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b8982d1dd4b3024952e2d7f297650f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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2023-08-20更新
|
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|
3卷引用:内蒙古自治区包头市东河区2023-2024学年九年级上学期期末数学试题
内蒙古自治区包头市东河区2023-2024学年九年级上学期期末数学试题湖南省岳阳市岳阳县2022--2023学年八年级上学期期末数学试题(已下线)第08讲 专题3 平行四边形(特殊的平行四边形)中的动点问题-【帮课堂】2023-2024学年八年级数学下册同步学与练(人教版)
4 . 如图,在菱形
中,
,点E,F分别从点B,D同时以同样的速度沿边
,
向点C运动. 给出以下三个结论中,正确的是:___________ (填写序号)
①
;②
; ③ 当点E,F分别为边
,
的中点时,
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b2669be05c12ea71eaf15bd0886e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/234140d3-90eb-4fef-819f-8556b52528e2.png?resizew=159)
您最近一年使用:0次
5 . 如图,在正方形
中,点
是边
上的动点(不与
,
重合),连接
交
于点
,过点
作
的垂线,交
平点
,连接
,
,以下结论中:①
;②
;③
;④当
时,
.正确的是___________ (将正确结论的序号填在横线上)
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851b6466fc810946d7f12926e35000d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc19039f5f41402f40e8a5219d164088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae1863cfdbe08fd508a7c85806a05e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0487ebca22d4aa1233073f81fd70a424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0264d4c4a39b5e4e3fa8c3b24f5b1287.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/5a89888a-ea64-4064-9efa-07de9788066c.png?resizew=149)
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6 . 如图,正方形
外取一点E,连接
.过点A作
的垂线交
于点P,若
,
.下列结论:①
;②点B到直线
的距离为
;③
;④
,其中正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e459ae7f530f7990718fd9c5fbc7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17d3ece9b7096aa5db32383448a072f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd94ce5e3c9daeb9129d945a45a953e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ecee2530431d7b1be2b86223162d47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735a10502b6e23831dff8c6ec363733d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/19/13638dde-a367-4cdb-8001-07887542bf9c.png?resizew=149)
A.①③④ | B.①②③ | C.②③④ | D.①②③④ |
您最近一年使用:0次
2023-09-18更新
|
150次组卷
|
5卷引用:广东省深圳市中科实验学校2023-2024学年九年级上学期开学考数学试题
广东省深圳市中科实验学校2023-2024学年九年级上学期开学考数学试题广东省深圳市龙华区教育科学研究院附属实验学校(光明)2023-2024学年九年级上学期月考数学试题广东深圳红岭教育集团深康学校2023-2024学年九年级上学期期中数学试题广东省深圳市福田区红岭教育集团2023-2024学年九年级上学期期中数学试题(已下线)期末压轴专题分类01(必刷60题15种题型专项训练)-2023-2024学年九年级数学上学期期末考点大串讲(北师大版)
7 . 如图,等腰直角三角形
,
,D,E是
上的两点,且
,过D,E作
分别垂直
,垂足为M,N,交于点F,连接
.其中①四边形
是正方形;②
;③
;④当
时,
.其中,正确结论有______ .(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f915896988fae9d97def193c6fb769d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4fa2c4bd682b3fc8667728ba8f2f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7743ddf60514a7b1115dbf6ea011b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b860e0b9f77ffc068933de47696a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1635da19b8b46ad0b7470000d7f2549f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0476d5693d7caed14b41d8e16047b005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58eee7d43bc258f5db87487e2db10acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b79daf1967b11b29f793648ce07571.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/30/da94d96c-5688-48f9-b109-823b478c6724.png?resizew=234)
您最近一年使用:0次
8 . 如图,在正方形
中,点E、F分别在边
、
上,
、
分别交
于点M、N,连接
、
,且
.下列结论:①
,
;②
;③
;④
;⑤图中只有4对相似三角形,其中正确结论的序号是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a3643f9c56b30588d7492981bc9651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8acc4ec4ae39819c790108ba72a1e0cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8df5c9bba54641ce3a58d71b47e7bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24dfa37067ff455888ebe076eeb1fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe793d674ac6067a0dab33c37d32a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4334115dca99f31de1f5accf793828a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/4d1fe4a6-9e63-4d4b-8e2c-853e0695be8a.png?resizew=143)
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9 . 如图,正方形
的边长为
,点
为对角线
上一动点
点
不与
、
重合
,过点
作
交直线
于
,将线段
绕点
逆时针旋转
得到线段
,连接
,
,
,下列结论:
;
;
;
的最小值为
,其中正确的是______
填写所有正确结论的序号![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3a3137299ffaea0545cd45323f1af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202d3220022e81b74be7da5cf0de788c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa438db4f261766c23a0acda341fe232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3594d7d712b93afdf16b7309199029b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2eb5e55b0fe5bfc8644c7511707f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a301324443eb93b467134a86890dd9ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
您最近一年使用:0次
10 . 【发现问题】(1)数学活动课上,王老师提出了如下问题:如图1,在
中,
,
,求
边上的中线
的取值范围.
【探究方法】第一小组经过合作交流,得到了如下的解决方法:
①延长
到E,使得
;
②连接
,通过三角形全等把
、
、
转化在
中;
③利用三角形的三边关系可得
的取值范围为
,从而得到
的取值范围是______.
方法总结:解题时,条件中若出现“中点”、“中线”字样,可以考虑倍长中线构造全等三角形,把分散的已知条件和所求证的结论集合到同一个三角形中.
【问题解决】
(2)如图2,
是
的中线,
是
的中线,且
,
,下列四个选项中:直接写出所有正确选项的序号是______.
①
②
③
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
【问题拓展】
(3)如图3,
,
,
与
互补,连接
、
,E是
的中点,求证:
.
(4)如图4,在(3)的条件下,若
,延长
交
于点F,
,
,则
的面积是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/15/21a536b2-930b-47b5-86b2-eb957738e059.png?resizew=365)
【探究方法】第一小组经过合作交流,得到了如下的解决方法:
①延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97392ff60fac8a261c6eab71bba028b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
③利用三角形的三边关系可得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4f7432b824c434b0a733ff9401c33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
方法总结:解题时,条件中若出现“中点”、“中线”字样,可以考虑倍长中线构造全等三角形,把分散的已知条件和所求证的结论集合到同一个三角形中.
【问题解决】
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba0db442bddfa899bc89e15459e58e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91aa309697c5aefc87bd0b14dafe14d6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9e3f95ad200eb0abeb1cd67133628c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ff4152c3e5998ae8e0ed8641f898bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26656dce1b664fdbc1b207ee4ead267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
【问题拓展】
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/454b6221d931d7b0166d296bbcc5c315.png)
(4)如图4,在(3)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af50cf2832f5f794166ea50dc1cd4964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48813b8fc61cdb0c54fbc6a2e4bbd30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
您最近一年使用:0次
2023-08-14更新
|
602次组卷
|
3卷引用:2024年辽宁省大连市中考一模考前数学模拟预测题