如图1,在
中,
,
,将线段
绕点B逆时针旋转
得到线段
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/74a67c1a-ba47-46f6-9d82-be8324fe497e.png?resizew=245)
(1)如图1,直接写出
的大小;(用含
、
的式子表示)
(2)如图2,当
时,E为
外的一点,
,
,判断
的形状,并加以证明.
(3)若将线段
也绕点B顺时针旋转
得到线段
,当C,D,E三点在同一条直线上时,请探究
与
的数量关系,并说明理由.
![](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/59216f3add27dc502797a3fd69cb9d6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8c9ac0efe45316bd2e028938aa3707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/74a67c1a-ba47-46f6-9d82-be8324fe497e.png?resizew=245)
(1)如图1,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b235c077d324c45527cee213a48c1fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976fc5c8025c93656b86361dcdfb10a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2573d44bd027ab2e2fc2472c7852af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
(3)若将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
更新时间:2024-01-18 13:45:40
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】综合与实践,如图,以
为边向两侧作
和
为
的中点,连接
.
,
,
,求
的长.
(2)如图2,连接
交
于点
为
上一点,
,
,
.猜想
与
之间存在的数量关系,并证明你的猜想.
(3)如图3,
是以
为斜边的等腰直角三角形,若
,请直接写出当
取最大值时,
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2352633c99dfeee172eaf9c23e45fbe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162ce08ead3fc7f199a7ca1616247abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f12cacb8b66100d800356b2ba0b0df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e400f7f216e1df9e118623cbaf090f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51b95da11fcd4205ad82a54243fc88d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,连接
![](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/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c669be0e3706f11b6e7f94bb7510e53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8319cd9ea897e7951866c2e6c00432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e64aa33e4aff43ad8b23b5b28104ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff63ff87e9f11b44663542cd55835de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe80e7ad78cc1d483e37151942958547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在平面直角坐标系中,
,
两点的坐标分别为点
、点
,将线段
绕点
顺时针旋转
得到
,连接
.
(1)若
.
①如图1,
,直接写出点
的坐标为______;
②如图2,
为
中点,连接
.求证:
平分
;
(2)如图3,若
,
,
为
边上一点,
为
延长线上一点,
,连接
,将线段
绕点
逆时针旋转
得到
,连接
.求当
取何值时,线段
最短.
![](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/241ce9bd28046ce9b90f43b391132884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efc7b22d85ff04a0ac89743f0bea1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/fb9c1e7c-1df9-4ac0-bf01-163f012392b9.png?resizew=399)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d392a6c7dbb77784d4c5d00ae639b9.png)
①如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
(2)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0231b0748f8d949ff7fc9ab5b7b2179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/2cdc9f4a99b567a6ee4be3943beeddca.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3a3bf63440a2fdd769162516fb0e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】如图,在平面直角坐标系中,点
,点
,点
,且a、b满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/ff84f8b5-c878-4f44-a687-19dfe3168bae.png?resizew=191)
(1)点A的坐标为______,点B的坐标为______;
(2)求证:
;
(3)若
,过点A作射线l(射线l与边BC有交点),过点B作
于点D,过点C作
于点E,过点E作
于点F交y轴于点G.
①求证:
;
②求点G的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d47b9fca60f683e4ed854fdb30c0a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38145807a822e57d92d07ac8dd01b31f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd4921fdebedad463d708690fe3cfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97e74421ae2008581c703bdc90813c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/ff84f8b5-c878-4f44-a687-19dfe3168bae.png?resizew=191)
(1)点A的坐标为______,点B的坐标为______;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10d461a7c0b86a2f09c2ea17f38260e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0a2d7d40a6c0bf1fddb802db381689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6411dec63998be60c272d5367e84a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1ac7e4a2bcadf49838113ab6d95950.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e6363330b33ca9feda927e6ffd3088.png)
②求点G的坐标.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在四边形
中,对角线
和
相交于点
,且
.
(1)求证:
;
(2)如图
,点
在
边上,
与
相交于点
,
,若
,
,试探究
与
的数量关系,并说明理由;
(3)如图
,在(
)的条件下,
与
相交于点
,若
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f630195bcf6c3ca8f4fdeff43b082.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/3f7ab497-ece5-4cd1-9e59-92d6863709fc.png?resizew=349)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41dd604f1f4705f749d6d7d93a580d3.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d1125b47dec1c5e93143ee59ad862a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b1424452ccf22cd5384c99cf4cdf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330bb061040917c1b40304dc0ec1e57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】等腰△ABC中,AB=AC,AD⊥BC于点D,点E是AD上的一点,连接CE,将线段EC绕点E顺时针旋转一定的角度,使得点C落在了点F处,且满足∠CEF=∠CAB,连接BF
![](https://img.xkw.com/dksih/QBM/2019/6/20/2229544098758656/2230349317267457/STEM/670c13deb98b435f8d81c47e19c88e86.png?resizew=462)
(1)如图,若∠BAC=60°,则线段AE与BF的数量关系为 ;
(2)如图,若∠BAC=90°,求证:BF=
AE:(写出证明过程)
(3)如图.在(2)的条件下,连接FD并延长分别交CE、CA于点M,N,BC=8,FD=
DE,求△DCN和△CMN的面积
![](https://img.xkw.com/dksih/QBM/2019/6/20/2229544098758656/2230349317267457/STEM/670c13deb98b435f8d81c47e19c88e86.png?resizew=462)
(1)如图,若∠BAC=60°,则线段AE与BF的数量关系为 ;
(2)如图,若∠BAC=90°,求证:BF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)如图.在(2)的条件下,连接FD并延长分别交CE、CA于点M,N,BC=8,FD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在
中,点
为边
上一点,延长
至点
,连接
,与
交于点
.
![](https://img.xkw.com/dksih/QBM/2022/1/22/2900011712290816/2901237981077504/STEM/998df98f-ead7-4387-bb34-ed7980e9cbca.png?resizew=373)
(1)如图1,若
且
,过点
作![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
BC交
于点
,求
的值;
(2)如图2,过点
作
于点
,若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2022/1/22/2900011712290816/2901237981077504/STEM/998df98f-ead7-4387-bb34-ed7980e9cbca.png?resizew=373)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab709d9bbbdb8585120343268a5a0723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b430e98ea87209da6b3bbda34ea67c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
(2)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc40023eeb4812fd128e61c384e88cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f630767ee09b860c735ab75b04dc3dfe.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图1,抛物线
经过A(-1,0),C(3,-2)两点,与
轴交于点D,与
轴交于另一点B.
(1)求此抛物线的解析式;
(2)若直线
(
)将四边形ABCD面积二等分,求
的值;
(3)如图2,过点E(1,1)作EF⊥
轴于点F,将△AEF绕平面内某点P旋转180°得△MNQ(点M、N、Q分别与点A、E、F对应),使点M、N在抛物线上,求点N和点P的坐标?
![](https://img.xkw.com/dksih/QBM/2014/6/16/1573733859008512/1573733865431040/STEM/0680675f991c4945abe381040d76604c.png?resizew=244)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95f7a30101f8813e5550da12bb2d5b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求此抛物线的解析式;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)如图2,过点E(1,1)作EF⊥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2014/6/16/1573733859008512/1573733865431040/STEM/0680675f991c4945abe381040d76604c.png?resizew=244)
![](https://img.xkw.com/dksih/QBM/2014/6/16/1573733859008512/1573733865431040/STEM/9d3e98e1fe10455382bf25dce99fa71c.png?resizew=215)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐2】如图1,在三角形
中,
,
和
关于
对称
(1)将图1中的
以
为旋转中心,逆时针方向旋转角
,使
,得到如图2所示的
,分别延长
和
交于点
,则四边形
的形状是 ;
(2)将图1中的
以
为旋转中心,按逆时针方向旋转角
,使
,得到如图3所示的
,连接
和
,得到四边形
,请判断四边形
的形状,并说明理由;
(3)如图3中,
,将
沿着射线
方向平移
,得到
,连接
,使四边形
恰好为正方形,请直接写出a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b407a8eddd328a0bd68ed0eca5261f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(1)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.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/42aee5508161bbecffca5163012441d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde5887839dd18ed82ebcc5154a03bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a54fa976f4dfc7f1b0545cd97784c84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c78b9ebf413a28fcd231e925d7ea413.png)
(2)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.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/e1f0eef89620b2f0cb24577a69b5029b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde5887839dd18ed82ebcc5154a03bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd93ad139410a0bc761cce65c84f599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723346bc9b76b6c2763a49d99d6b4f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/723346bc9b76b6c2763a49d99d6b4f15.png)
(3)如图3中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f3f1ba29e00067ed5baa0181044e571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde5887839dd18ed82ebcc5154a03bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c862bde957fbe892e183c36c13642f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34bee4fe3087c807710dccb6b4ea0212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5363798835a0ba18b5080a544151a763.png)
![](https://img.xkw.com/dksih/QBM/2020/4/17/2443620818083840/2445473730371584/STEM/7d0e8e0043d64ebe90d3a872e35ff7a4.png?resizew=442)
您最近一年使用:0次