在矩形ABCD中,直线MN经过点A,BE⊥MN于点E,CF⊥MN于点F,DG⊥MN于点G.
(1)当MN绕点A旋转到图①位置时,求证:BE +CF =DG; .
(2)当MN绕点A旋转到图②和图③位置时,线段BE,CF,DG之间又有怎样的数量关系?
请写出你的猜想,不需要证明;
(3)在(1)(2)的条件下,若CD =2AE =6,EF =
,则CF= .
(1)当MN绕点A旋转到图①位置时,求证:BE +CF =DG; .
(2)当MN绕点A旋转到图②和图③位置时,线段BE,CF,DG之间又有怎样的数量关系?
请写出你的猜想,不需要证明;
(3)在(1)(2)的条件下,若CD =2AE =6,EF =
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://img.xkw.com/dksih/QBM/2019/12/5/2348629256290304/2349248893714432/STEM/e0e3bbf0f38a4905a21ab262c569b635.png?resizew=542)
更新时间:2019-12-06 13:02:01
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
,将
绕点
顺时针旋转
度
得到
,连接
,线段
(或其延长线)分别交
、
于
、
点.
![](https://img.xkw.com/dksih/QBM/2023/1/12/3151091459588096/3151386577707008/STEM/8138ca7f5aec4babb2b12c796f9a7365.png?resizew=365)
(1)求证:
;
(2)在旋转的过程中,是否存在一个时刻,使得
与
全等?若存在,求出此时旋转角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4721089d05b03f280ab38072675f551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b2b5d548905471ee8fa7ab280e4f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c9a77f3dcaacefe3ee0a64ddf7f73a.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2023/1/12/3151091459588096/3151386577707008/STEM/8138ca7f5aec4babb2b12c796f9a7365.png?resizew=365)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5743ccb6529cefe7c6760def68f3d357.png)
(2)在旋转的过程中,是否存在一个时刻,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66db4a2bbf1caae6ab1ff564d3653162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b510bc04c7a2e782d1efce364079a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】问题背景:如图
,两条相等的线段
,
交于点
,
,连接
,
,
求证:
.
证明:过点
作
的平行线,过点
作
的平行线,两平行线交于点
,连接
.
,
.
四边形
为平行四边形,则
______,
.
,
.
又
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
为等边三角形,
______.
,即
.
(2)迁移应用:如图
,正方形
的边长为
,点
在边
上,点
在边
上,点
在
上,过点
作
的垂线,交
于点
,交
于点
.
求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
;
(3)联系拓展:如图
,
为等腰三角形,
,过点
作
的平行线
,点
在直线
上,点
到
的距离为
,求线段
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79684a6e92297749c005e2b23cac9710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c32278a1aaf76844cfec71ae0c50d6.png)
证明:过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a1cd40abcd1eef24fac90af2371a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b43be568ae5186900cfb39484a3c9301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a876bc003f6c042c24ff4d8c11c8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17101383eb0787edaaa35adfcd20d5c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a1cd40abcd1eef24fac90af2371a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db110fe5bd2f503ea8725e84e882871.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9823cfdfafe1bd50f4ea9195bd1dd02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b91b5505c3053000fce60090262fe6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c32278a1aaf76844cfec71ae0c50d6.png)
(2)迁移应用:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f9bc3d52c7d01890b09ed152e4c8662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016269188fac805f7ffb1bde55db65ca.png)
(3)联系拓展:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】已知正方形ABCD.
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546706626183168/2548284635619328/STEM/ad5b8fbbd37e46a5bfbe21338dc3388e.png?resizew=447)
(1)点P为正方形ABCD外一点,且点P在AB的左侧,
.
①如图(1),若点P在DA的延长线上时,求证:四边形APBC为平行四边形.
②如图(2),若点P在直线AD和BC之间,以AP,AD为邻边作
,连结AQ.求∠PAQ的度数.
(2)如图(3),点F在正方形ABCD内且满足BC=CF,连接BF并延长交AD边于点E,过点E作EH⊥AD交CF于点H,若EH=3,FH=1,当
时.请直接写出HC的长________.
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546706626183168/2548284635619328/STEM/ad5b8fbbd37e46a5bfbe21338dc3388e.png?resizew=447)
(1)点P为正方形ABCD外一点,且点P在AB的左侧,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6901e8b018a80e917540462d2f3aadd.png)
①如图(1),若点P在DA的延长线上时,求证:四边形APBC为平行四边形.
②如图(2),若点P在直线AD和BC之间,以AP,AD为邻边作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf830ae42bb3d5512aeb167ec7cf7ee.png)
(2)如图(3),点F在正方形ABCD内且满足BC=CF,连接BF并延长交AD边于点E,过点E作EH⊥AD交CF于点H,若EH=3,FH=1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe48cffbf9b2ec0b31585ef25b07bec.png)
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名校
解题方法
【推荐2】如图,在平行四边形ABCD中,AC为对角线,过点D作DE⊥DC交直线AB于点E,过点E作EH⊥AD于点H,过点B作BF⊥AD于点F.
(1)如图1,若∠BAD=60°,AF=3,AH=2,求AC的长;
(2)如图2,若BF=DH,在AC上取一点G,连接DG、GE,若∠DGE=75°,∠CDG=45°﹣∠CAB,求证:DG=
CG.
(1)如图1,若∠BAD=60°,AF=3,AH=2,求AC的长;
(2)如图2,若BF=DH,在AC上取一点G,连接DG、GE,若∠DGE=75°,∠CDG=45°﹣∠CAB,求证:DG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://img.xkw.com/dksih/QBM/2020/5/26/2470781407166464/2471601851400192/STEM/a88f1fbd2bc3463f98ccde3595a46823.png?resizew=515)
您最近一年使用:0次
解答题-问答题
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较难
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【推荐1】如图,
的斜边OA在y轴上,
,
,将
绕原点顺时针旋转得到
,旋转角记作
,点A、B的对应点分别为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/712d06f0-474f-4e21-a27c-91d6361cb611.png?resizew=303)
(1)如图①,当
时,求点
和点
的坐标;
(2)如图②,当
时,求点
的坐标;
(3)在(2)的条件下,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b352fa3e781df195ceccca90c3932a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6131160eaee962470abc7771df265c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb8015df9744ca1df1f736a1ce20b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c633830c6e2ac6d8d6e18890ef5ee33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21e44af368f3336354704d92609f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01d83543a84ec03a5514b612189ffcd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/712d06f0-474f-4e21-a27c-91d6361cb611.png?resizew=303)
(1)如图①,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c96cb3ac8290e09c55d4eb336a8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(2)如图②,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c69a23d106fd34aa17b22e9c9a8de36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
(3)在(2)的条件下,直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
名校
【推荐2】如图,边长为
的等边
中,点
、
分别是边
、
上的动点
端点除外
,点
从顶点
,点
从顶点
同时出发,且它们的速度都为
,连接
,
交于点
,在点
,
运动的过程中.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7465c3848d832ec772b6c1510d61aa59.png)
;
(2)
的大小是否发生变化?若无变化,求
的度数;若有变化,请说明理由;
(3)连接
,当点
,
运动多少秒时,
是直角三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7465c3848d832ec772b6c1510d61aa59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b13964019381c4cd9de05f95c4261b.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411bbe4c709c5b47899fa09298b54009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411bbe4c709c5b47899fa09298b54009.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
您最近一年使用:0次
【推荐1】如图,在矩形
中,
,
为边
上一点,
,连接
.动点
从点
同时出发,点
以
的速度沿
向终点
运动;点
以
的速度沿折线
向终点
运动.设点
运动的时间为
,在运动过程中,点
,点
经过的路线与线段
围成的图形面积为
.
⑴
________
,
________°;
⑵求
关于
的函数解析式,并写出自变量
的取值范围;
⑶当
时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a53bdaf56f934464c3a41acce46d5f.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/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f24b6c5a216b8bfc198306c187c9730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/f2f9a9781bcf32e907bdd3170261648a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f602a637e57761b115810931ae8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b4d0cb418274e8330fd2daffabd9b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/355f3478ab074ebea4b3b11f00651ece.png)
⑴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bade41170c7d831b86c622977f7c402.png)
⑵求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
⑶当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79219833c041e7f92765df4930474963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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2】在四边形
中,
,
平行于
,
,
,点
在线段
上,联结
,过点
作
,与
交于点
,设
的长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/db462725-28c8-4ae0-a884-06b461c24bb6.png?resizew=221)
(1)当
时,求线段
的长;
(2)设
的面积为
,求
关于
的函数关系式,并写出自变量
的取值范围;
(3)当
与
相似时,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.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/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9425630dcfe5a824c44904d4f71e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/db462725-28c8-4ae0-a884-06b461c24bb6.png?resizew=221)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd50cf631e459b58b180cdf2f57844c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc34a42e6838de94da6dc08e0b578cd.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db8b0f0ac45b16388d408a60e69bcdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a545b49d4d7c86888a75b6cf97b59e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次