如图1,点
是正方形
对角线
的延长线上任意一点,以线段
为边作一个正方形
,线段
和
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/68656274-107e-4e4d-8dab-8ec7f8222f37.png?resizew=385)
(1)求证:
,
.
(2)若
,
,求
的长.
(3)如图2,正方形
绕点
逆时针旋转
,连结
、
,
与
的面积之差是否会发生变化?若不变,请求出
与
的面积之差;若变化,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/68656274-107e-4e4d-8dab-8ec7f8222f37.png?resizew=385)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdf89efec5784b6048bebcb7985b69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c66e8f9b76b2e3bc6b5d894cf505dc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ee3e567700c1d5b17944ffc6229c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)如图2,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4523e4270902cdb77983d2f740c9de74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1b68f13fed987f5209197de7bc8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1b68f13fed987f5209197de7bc8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
20-21八年级下·浙江宁波·期中 查看更多[3]
浙江省宁波市镇海区镇海区立人中学2020-2021学年八年级下学期期中数学试题(已下线)第一次月考-【单元测试】2022-2023学年八年级数学下册分层训练AB卷(湘教版)(已下线)专题18.2 (特殊)的平行四边形中的翻折、旋转与动态问题 专题讲练-2022-2023学年八年级数学下册重难题型全归纳及技巧提升专项精练(人教版)
更新时间:2023-01-16 15:17:46
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相似题推荐
解答题-计算题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系中,点
,
,将线段
绕点B顺时针旋转
至
,连接
、
.
,求E点坐标及
.
(2)若点D、F分别是
、
中点,连接
、
,连接
与
交于点G,若
为n,求
(用含n的式子表示).
(3)在(2)的条件下,求线段
与
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77f1e7cdbed3841def7d31d632a3a9fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9ac0a7acd8f9e937610741313230e3.png)
(2)若点D、F分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90eddd1d7996f7e30d86d84fd09dbfe7.png)
(3)在(2)的条件下,求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
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解答题-计算题
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【推荐2】计算:(1)
÷
-
×
÷
;
(2)
×
+
;
(3)
-
÷
×
;
(4)(3
+
-4
)÷
;
(5)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46f33f578fbb88a7525ef32e7126856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f66fc51d58aae7aba5028fca8bd48a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde029ac94c601540583c64bc48c17bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b349899258f7e34779a465212d6bcf48.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fda303240e35a04641e7e602dcc414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1002f6d81a734b5655f0bdd749bdf24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe55f074ad25ed279fc53b174309bfa.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea872287a155776bf38d4a4cab7e464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f66fc51d58aae7aba5028fca8bd48a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2737bceff26721c9375335e8dc5295a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78703e9586d7651e05883ad925546cf.png)
(4)(3
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea872287a155776bf38d4a4cab7e464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59aaff5da36eea267e65c941735c925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f66fc51d58aae7aba5028fca8bd48a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83883af1551c69a513e24e9389fc049.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f637121532e042f152be41c5f2fd10.png)
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【推荐1】在
中,
,
,
是
的角平分线,
于点E.
,求证:
是等边三角形;
(2)点M是
边上一个动点(不与点D重合),以
为一边,在
的下方作
,
交射线
于点G,请画出完整图形,探究
与
数量之间的关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddf629bfb2d7b9daea6f2c1553360af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6818a98204f62c1b16699d26ca0c3f62.png)
(2)点M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1cf4e240c303b3d93fc2420c26d6e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05a97e3dc3faeea3322d43c9074d747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐2】已知,如图,△ABC和△ADE是两个完全相同的等腰直角三角形,且∠ABC=∠AED=90°;
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924032045580288/2938057229885440/STEM/8455cd45fa5e4da3ac2d6085bc968bc7.png?resizew=489)
(1)如图1,当△ADE的AD边与△ABC的AB边重合时,连接CD,求∠BCD的度数;
(2)如图2,当A,B,D不在一条直线上时,连接CD,EB,延长EB交CD于F,过点A作AG⊥EB,垂足为点G,过点D作DT⊥EB,垂足为点T,求证:EG=FT;
(3)在(2)的条件下,若AF=3,DF=2,求EF的长.
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924032045580288/2938057229885440/STEM/8455cd45fa5e4da3ac2d6085bc968bc7.png?resizew=489)
(1)如图1,当△ADE的AD边与△ABC的AB边重合时,连接CD,求∠BCD的度数;
(2)如图2,当A,B,D不在一条直线上时,连接CD,EB,延长EB交CD于F,过点A作AG⊥EB,垂足为点G,过点D作DT⊥EB,垂足为点T,求证:EG=FT;
(3)在(2)的条件下,若AF=3,DF=2,求EF的长.
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解答题-问答题
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名校
【推荐3】【方法提炼】
解答几何问题常常需要添辅助线,其中平移图形是重要的添辅助线策略.
【问题情境】
如图
,在正方形
中,
分别是
上的点,
于点
.求证:
.
小明在分析解题思路时想到了两种平移法:
方法
:平移线段
使点
与点
重合,构造全等三角形;
方法
:平移线段
使点
与点
重合,构造全等三角形;
【尝试应用】
(2)如图
,正方形网格中,点
为格点,
交
于点
.求
的值;
(3)点
是直线
上的动点,分别以
为边在
的同侧作正方形
与正方形
,连接
分别交线段
于点
.
求
的度数;
连接
交
于点
,若
,直接写出
的值.
解答几何问题常常需要添辅助线,其中平移图形是重要的添辅助线策略.
【问题情境】
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f9759f5185ecb46de48720ce636860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1145f2c34908eacd332d22f904659d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d3a004c4f6c29bd52364eb658c704b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7b05f1f0d9dfcd37da1e437861aae6.png)
小明在分析解题思路时想到了两种平移法:
方法
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
方法
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
【尝试应用】
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2740d2f1f18082f6299bd23e0be289c.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/98f11470b8d9a06f916120f20adffb9f.png)
(3)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/82979b6a2057d80bacba4a28973bd508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bdc60a42a1addaf772c18972e576fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc497d9e08a3652fccce2674b5e1bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d15c06982c7e5eae3d140e852460afe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c98538f59b61d4e4ec92f8aa54bf0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e450a63f3c4e7020b1967343c541ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9c29abd53456f9beb7bc56273e85bb.png)
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【推荐1】一次函数y=kx+b的图象与x轴的负半轴相交于点A,与y轴的正半轴相交于点B,且∠ABO=60°.△OAB的外接圆的圆心M的横坐标为−6.
(1)求图中阴影部分的面积;
(2)点C为的中点,在直线AB上是否存在一点N,使NO+NC的值最小,若存在,求出这个最小值;若不存在,请说明理由;
(3)若P是x轴上一动点,当△PAB为等腰三角形时,直接写出点P的坐标.
(1)求图中阴影部分的面积;
(2)点C为的中点,在直线AB上是否存在一点N,使NO+NC的值最小,若存在,求出这个最小值;若不存在,请说明理由;
(3)若P是x轴上一动点,当△PAB为等腰三角形时,直接写出点P的坐标.
![](https://img.xkw.com/dksih/QBM/2020/12/1/2604804696555520/2608499679748096/STEM/24499bbae53e4f3a88e2ddee3c620bd0.png?resizew=165)
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【推荐2】如图,在正方形ABCD中,
,E为BD上的动点,连接AE并延长交正方形ABCD的边于点F,将AF绕点A逆时针旋转90°得到AG,点E的对应点为点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/61a82ad8-52fb-4e22-a5df-8b69c57514b8.png?resizew=326)
(1)连接DH,求证:
;
(2)当
时,求BF的长;
(3)连接BH,请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/61a82ad8-52fb-4e22-a5df-8b69c57514b8.png?resizew=326)
(1)连接DH,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf948c913f56dda865a4227be0cc6970.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87f9586b708869fd7186e75a75c1dcf.png)
(3)连接BH,请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce2ca1e1ce11cd37a3c22b985992a2e.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
名校
【推荐1】如图,在
的网格中,
的三个顶点都在格点上.
为
的外接圆,请在指定的网格中用无刻度的直尺作图:
中标出这个外接圆的圆心
,并写出
________;
(2)在图
中画出
的角平分线
交
于
;
(3)在图
中画出
关于直线
对称的
;
(4)在图
中,若
交
于点
,画出平行四边形
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb04cecda15f15130411851e4e41398d.png)
(2)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](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/e742966e3711cfa53dce04022acf4bcc.png)
(4)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3093f928cbb7c473c01b21822593c0a.png)
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解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,在正方形
中,点
在边
上,点A关于直线
的对称点为点F,连接
.设
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/8356ca10-85c7-4237-bc0d-ea9d8fe5235f.png?resizew=331)
(1)试用含
的代数式表示
;
(2)作
,垂足为G,点G在AF的延长线上,连接
,试判断
与
的位置关系,并加以证明;
(3)把
绕点B顺时针旋转90°得到
,点E的对应点为点H,连接
,若
是等腰三角形,求
的值.
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf477ccd908dc7826fc9dfc70d0a3b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3160d33de228937b8a691519fced22e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/8356ca10-85c7-4237-bc0d-ea9d8fe5235f.png?resizew=331)
(1)试用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300d3ec6447250bb25915ae86873929a.png)
(2)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bab4f7ca681a83a0f3e95feb740a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cbeac5798a155ac8649f1236fe451d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4acd8c1fd5046f210b6a3393cbe8c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0240ca878cb089ce3e33a6e67d382ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
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