1 . 如图,在
中,
,
是
的平分线,过点
作
于点
,延长
交
的延长线于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/23a771fd-0990-4fa2-8d27-b3a68ead407a.png?resizew=237)
(1)求证:
;
(2)若
,
,求
的长.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95adbf026e5ad4ce6f123e5e0b89da7d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/23a771fd-0990-4fa2-8d27-b3a68ead407a.png?resizew=237)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226c231c1150e27c34eb787a46b02ea8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce84f6062f12bf6ef42d7b733cd2248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291429b0d1f38a5a0b76af7451120d88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
2024-04-08更新
|
200次组卷
|
2卷引用:河南省郑州市2023-2024学年北师大版八年级上册数学期中试题
2 . 如图,
在平面直角坐标系中,顶点
,
在x轴上,顶点A在y轴的正半轴上,
,垂足是D,
交
于点E,
,
.请解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/345c1d96-a4cf-45be-9102-d509e583609c.png?resizew=142)
(1)求点B、点C的坐标;
(2)求线段
的长;
(3)连接
.若
,在坐标轴上是否存在点F,使
?若存在,请直接写出点F的个数和其中一个点F的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015588c83ec8316b0eb53f5e8e696621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cb66da86704cbbb985fd0b0b6c08c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee3841395a418ff770fdf24d5b443f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f3460c4804c70eb4a5881835bfbabe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/345c1d96-a4cf-45be-9102-d509e583609c.png?resizew=142)
(1)求点B、点C的坐标;
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af9774200946261f0ccba3e6eeba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e98eee4406012be0a025d1427147c79.png)
您最近一年使用:0次
2024-04-04更新
|
258次组卷
|
3卷引用:黑龙江省牡丹江市第十四中学2023-2024学年八年级上学期期末数学试题
黑龙江省牡丹江市第十四中学2023-2024学年八年级上学期期末数学试题黑龙江省牡丹江市2023-2024学年八年级上学期期末数学试题(已下线)专题19.27 一次函数(全章分层练习)(培优练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)
3 . 如图,四边形
是正方形,顶点
在直线
:
上将正方形OABC沿
轴正方向平移
个单位长度,若正方形
在x轴上方的其他任一顶点恰好落在直线
上,则m的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9576c9c6dd72e7832591f7a0b22fea04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8731cd9b515c4cd1bf1bcbc69ec0a249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88dc86ad6c966febbad5cb0657dd649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/5601468e-da2e-4d5c-b8bd-f5e9f254910c.png?resizew=138)
您最近一年使用:0次
2024-03-29更新
|
217次组卷
|
3卷引用:河南省新乡市2023-2024学年九年级上学期第一次学业水平模拟考试数学试题
4 . (1)如图1,在
中,
,点
是
边上一点,连接
,
,
两点都在线段
上,连接
,
,过
作
交
延长线于点
,若
,
.求证:
;
(2)如图2,在
中,
,点
为
下方一点,连接
,
,过
作
交
于点
,若
,
,
,求
的长.
![](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/8455657dde27aabe6adb7b188e031c11.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3275b04cb57af1d26fe2562cc4daa445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0af831d8dd327f64c00f13ecd0e2625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5143d076f4916c31cf8ef04bf2949f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76956e451ab7fd18f473503c3745187d.png)
(2)如图2,在
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3275b04cb57af1d26fe2562cc4daa445.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5143d076f4916c31cf8ef04bf2949f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/4dc56878-5d56-4f8b-a171-ae5759de6e60.png?resizew=499)
您最近一年使用:0次
2024-03-27更新
|
50次组卷
|
2卷引用:河南省信阳市浉河区信阳市第九中学2023-2024学年八年级上学期期末数学试题
5 . 如图,在
中,
,点D为
中点.
,
绕点D旋转,
分别与
交于E,F两点.下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/71db94f5-3bd3-498e-87f8-42a1c7e5b812.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c287bb15494297df234f700f9f3a90d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ec1c115991846fc667c018ae3e0626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f870ef3dca4eb827dd81ab6a0a90520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76019d75e44f4946a89fe324b4f14074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40498c47c67464e4c50b3cea3af03f09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/71db94f5-3bd3-498e-87f8-42a1c7e5b812.png?resizew=147)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2024-03-16更新
|
77次组卷
|
3卷引用:浙江省宁波市余姚市2023-2024学年八年级上学期期末数学试题
浙江省宁波市余姚市2023-2024学年八年级上学期期末数学试题浙江省宁波市余姚市2023-2024学年八年级上学期期末数学试题(已下线)专题18.13 矩形(分层练习)(提升练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)
6 . 在
中,
,
是平面内一点,
,点
在
边所在直线上,
,垂足是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/aef3f1b2-f93a-40a5-b8cb-03c78fa130f2.png?resizew=457)
(1)当点
在线段
上时,如图①,求证:
;
(2)当点
在线段
延长线上时,如图②;当点
在线段
延长线上时,如图③,请猜想并直接写出线段
,
,
的数量关系;
(3)如图③,若
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dfeaa1835689c47033f9fc21461660c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7b5ea5627440c19999a9039eaa1c06.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/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/aef3f1b2-f93a-40a5-b8cb-03c78fa130f2.png?resizew=457)
(1)当点
![](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/360f6356c601f74aa78970793ef60056.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)如图③,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa61506c1f14478d5d07baff1016dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c999d6e2a84f345b40c12065530b68eb.png)
您最近一年使用:0次
2024-03-15更新
|
93次组卷
|
2卷引用:黑龙江省牡丹江市第十四中学2023-2024学年八年级上学期期末数学试题
7 . 如图,在
中,
,点D为线段
上一动点(不与点B,C重合),连接
,作
,DE交线段
于点E,下列结论:
①
;
②若
,则
;
③当
时,则D为
中点;
④当
为等腰三角形时,
;
正确的有______ .(把你认为正确结论的序号都填上).
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ddcdecc648966e21ae3928dc13684d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246f399406e42293be240caea9b845a0.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b34233772c4c26d6669499d9b1f15a.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d03dc7bb044da0863b871064a6748e.png)
正确的有
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/f031adc9-9001-4a2f-9cdf-619b3ef098ac.png?resizew=199)
您最近一年使用:0次
2024-03-10更新
|
44次组卷
|
2卷引用:内蒙古扎赉特旗音德尔第三中学2023-2024学年八年级上学期第一次月考数学试题
8 . 如图,在等腰直角三角形
中,
,
外角平分线交
延长线于点D,
,垂足是E,若
周长是8,则线段
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ff1dc90384c31780d24bc92b757c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() | B.9 | C.8 | D.7 |
您最近一年使用:0次
2024-03-10更新
|
80次组卷
|
2卷引用:黑龙江省牡丹江市第十四中学2023-2024学年八年级上学期期末数学试题
9 . 如图,在
中,
,以
的各边为边作三个正方形,点
落在
上,若
,空白部分面积为10,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc29330979e64e99678423e58759779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89779b35b7e25cc8f6b02153134de444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9卷引用:浙江省宁波市鄞州区2023-2024学年八年级上学期期末考试数学试题
浙江省宁波市鄞州区2023-2024学年八年级上学期期末考试数学试题浙江省宁波市鄞州区高桥镇等四校2023-2024学年八年级上学期期末数学试题广东深广州市白云区2023-2024学年八年级下学期开学考试数学试题(已下线)专题06+全等三角形和特殊三角形(4大易错点分析)2-备战2024年中考数学考试易错题(浙江专用)(已下线)专题02 勾股定理五大题型梳理-【好题汇编】2023-2024学年八年级数学下学期期中真题分类汇编(广东专用)2024学年甘肃省武威市凉州区怀安镇九年制学校九年级下学期中考模拟诊断数学模拟预测题湖南省花垣县华鑫教育集团2023-2024学年八年级下学期月考数学试题(已下线)重难点02+三角形与特殊三角形2甘肃省武威市凉州区武威第二十一中学2023-2024学年八年级下学期期中数学试题
10 . 如图,直线
与x轴、y轴分别交于点A,点B,点C的坐标为
,点
为
轴正半轴上的动点,连结
,过点
作直线
的垂线交
轴于点
,垂足为点
,连结
.
(2)求证:
;
(3)在点D的运动过程中,当
为等腰三角形时,请直接写出点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30056990f61f896705dbe3a1fd9d27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f28d35611af6d2c64ad19771297f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/6cad4595d5352b2884568a59d8d766a4.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72a5c100c3c3012aca64f29c0cfb0b6.png)
(3)在点D的运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771573280033454e2e005ba0b9b10715.png)
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3卷引用:浙江省宁波市南三县2023-2024学年八年级上学期期末考试数学试题
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