1 . 如图,在菱形
中,
,点
分别是边
和对角线
上的动点,且
,连接
相交于点M,点P是
边上的一个动点,连接
,则
的最小值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f862386eab3bd34c931de45232e2e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.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/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fbd0f56b46687f9635d4a3c3f7521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec596836574eb4b866205420c3a5e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbde97674526a51bc36ff4b91a07712.png)
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2 . 如图,E,F分别是正方形的边
,
上的点,连接
,
,
,
,则下列结论中一定成立的是( ).
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 图,已知正方形
的边长为5,点
是对角线
上的一点,
于点
,
于点
,连接
,当
时,则
的长度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13508fdc9e840fe612431360a6d451ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2cf1f58002106aa351b240b59af5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
A.![]() | B.3 | C.![]() | D.![]() |
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名校
4 . 在
中,
,
,点D为平面内一点.
上,且
,求
;
(2)如图2,若点D为
内部一点,且
,连接
,点E为
的中点,连接
,用等式表示线段
,
,
的数量关系,并证明:
(3)若点D满足
,当
时,请直接写出
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba77f66ecad8eb4a7a63f169f28a3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4600275dda575e545cab0145d9480d.png)
(2)如图2,若点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3bc83b7bb9d8e61c4656936fb112139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)若点D满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3bc83b7bb9d8e61c4656936fb112139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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名校
5 . 如图,四边形
是平行四边形,
,
是对角线
上的两点,且
.求证:
.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
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34卷引用:浙江省杭州市第七中学2019届九年级质量综合检测卷数学模拟试卷
浙江省杭州市第七中学2019届九年级质量综合检测卷数学模拟试卷2020年山东省济南市历下区九年级学业水平第一次模拟数学试题2020年山东省济南市历下区中考数学一模试题2019年陕西省西安市长安县第八中学中考数学二模试题(已下线)黄金卷03-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(福建专用)2024年西藏自治区日喀则市萨迦县中考一模数学试题山东省济南市历城区2018-2019学年年九年级上学期期末数学试题福建省泉州市第一中学2023-2024学年九年级下学期第一次月考数学试题2012-2013学年山东省滨州市高新区中学八年级下学期期中质量测试数学试卷北京市怀柔区2016-2017学年八年级下学期期末质量检测数学试题北京师范大学附属中学2017-2018学年八年级下学期期中考试数学试题山东省东营市胜利第二中学2018-2019学年八年级上学期期末考试数学试题【校级联考】四川省宜宾市翠屏区中学二片区2018-2019学年八年级下学期半期考试数学试题吉林省伊通满族自治县2018-2019学年八年级下学期期末考试数学试题贵州省毕节市金龙中学2019-2020学年八年级上学期10月月考数学试题贵州省毕节市织金县鸡场中学2019-2020学年八年级上学期10月月考数学试题江苏省镇江市句容市2018-2019学年八年级下学期期中数学试题陕西省商洛市商州区2018-2019学年八年级下学期期中数学试题江苏省沭阳县修远中学2019-2020学年八年级下学期第一次月考数学试题西藏自治区昌都市2021-2022学年八年级下学期期末数学试题(已下线)9.3 平行四边形-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(苏科版)福建省南平市建阳区2022-2023学年八年级下学期期中数学试题福建省永春第一中学2022-2023学年八年级下学期期中考试数学试题广东省汕头市蓝田中学2022-2023学年八年级下学期期中考试数学试卷新疆克孜勒苏柯尔克孜自治州第一中学2022-2023学年八年级下学期期末数学试题湖南省郴州市永兴县树德初级中学2022-2023学年八年级下学期期中数学试题陕西省延安市志丹县2022-2023学年八年级下学期期末数学试题第18章 平行四边形 18.1 平行四边形的性质华东师大版(2012)八年级下册课后作业湖南省永州市第九中学2022-2023学年八年级下学期第一次月考数学试题贵州省铜仁市印江土家族苗族自治县2023-2024学年八年级下学期3月月考数学试题湖北省随州市曾都区2023-2024学年七年级下学期期中数学试题广东省惠州市惠城区合生实验学校2023-2024学年八年级下学期期中数学试题湖南省永兴县树德中学2023-2024学年八年级下学期期中数学试题四川省泸州市泸县百和镇土主中心小学校2023-2024学年八年级下学期4月期中数学试题
6 . 如图,在正方形
中,
,点E在边
上运动,连接
,将
绕点E顺时针旋转
得到
,连接
,则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cf89cd1b2aa78def32c227659015e27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7471451108cf5d0fbb66e8819759a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c918f85ad26cc814bca7c4196d033458.png)
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7 . 综合探究:
是等腰直角三角形,
,点
为
上一动点,连接
,以
为边在
的右侧作正方形
,连接
,则线段
,
之间的位置关系为 ,数量关系为 .
探究2:如图2,当点
运动到线段
的延长线上,其余条件不变,探究1中的两条结论是否仍然成立?为什么?(请写出证明过程)
探究3:如图3,如果
,
,
仍然保留为
,点
在线段
上运动,请你判断线段
,
之间的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
探究2:如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
探究3:如图3,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eab933fd3ed8a3a412a6f268d4cef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5306ee783ec381da6c03d4fb7ecb4395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302efd5266f7868d8c67f7bb09dc2ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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8 . 已知点O是线段
的中点,直线l与直线
交于点P,分别过点A和点B作直线l的垂线,垂足分别为点C和点D.
和OD的数量关系是__________;
(2)【类比探究】
如图2,当点P是线段
上的任意一点时,线段
和
的数量关系是否依然成立?若成立,请给出证明;若不成立,请说明理由;
(3)【拓展提升】
如图3,当点P是线段
延长线上的任意一点时:
①请直接写出
和
的数量关系;
②若
,
,
,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(2)【类比探究】
如图2,当点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
(3)【拓展提升】
如图3,当点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
①请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497242726b4a10e4cdcf7cec6e64aa2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
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9 . 王老师带领同学们在探究几何问题变换时,与同学们一起探究下列问题,请你思考解决.如图1,在正方形
中,点P是射线
上的一个动点,连接
.
(1)
与
的大小关系是( )
A.大于 B.小于 C.相等 D.不能确定
【探究迁移】
(2)如图2,作
,
交
延长线于点E,判断
的形状并给出证明;
【拓展应用】
(3)
,
交直线
于点E,点P在运动的过程中,当
,
时,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c6f395358daa8bf4b656e1e3c80eb7.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
A.大于 B.小于 C.相等 D.不能确定
【探究迁移】
(2)如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284b8decff9b3641c09a36e7654d9e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ba8a7ce19548adba34a16080230360d.png)
【拓展应用】
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284b8decff9b3641c09a36e7654d9e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee215dc1a491f435e495e920e5317ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
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10 . 综合与实践
问题情境:在数学活动课上,老师对某道习题进行改编:如图1,
中,
,
,作
的边
上的高
,将
绕点
逆时针旋转
得到
.
(1)试判断
与
之间的数量关系,并说明理由.
猜想与证明:(2)如图2,连接
,顺次连接
的中点G,H,I,得到
,判断
的形状,并加以证明;
探索发现:(3)如图3,有同学发现
与
之间的数量关系是固定不变的,请直接写出
与
之间的数量关系.
问题情境:在数学活动课上,老师对某道习题进行改编:如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b40aa8d2482d698ebef69cf225f99f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f66ee1164e6972221f7b562f0e6caf.png)
(1)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
猜想与证明:(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bbf6df4c481e777638bd6e4ee8ee7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027d6eecbe2d8d43ae9a00784957aeff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027d6eecbe2d8d43ae9a00784957aeff.png)
探索发现:(3)如图3,有同学发现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
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