1 . 如图,在![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
中,
,点
是
的中点,连结
并延长,交
的延长线于点
,连结
,
.
的长;
(2)若
.
①证明
四边形
是菱形;
②若
,求四边形
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf3746205daae4787d8e31d74ba79e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f3ede9a1f0ed807a33812a35428312.png)
①证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4e1b8436cf2a739c7ba5d3c68165d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0ccbfc26cb282de5718f3db9b53101.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a719cb3370fe6ddc7d2437dfaa9b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c22cfc4596fb98999a99326ccc76e7.png)
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2 . 如图,在平面直角坐标系中,
,点P为y轴上一动点,连接
并延长至点D,使
,取y轴上一点B,以
为边作
,连接
,则
长度的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c33700c3358cbbd8db376f9f0613b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f0a92f55c60723665fb899d46100d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210830766989a07c24b05589007aebbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 如图,在
中,点E,F是对角线
上的两点,且
,连接
,
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a7f7b6c1f608debf99bc07089ba37.png)
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4 . 如图,
的对角线
,
相交于点O,点E、F在AC上,且
.求证:
.
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ada55c12a53a4c469e052445547bed96.png)
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5 . 如图,平行四边形
中,
,点F是线段
的中点,过点C作
交
于点G.
延长线交
于点H,且
.
,求
的值;
(2)如图2,连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c96e4f0ee8f087897ac685262e393ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14cc0840a74d0761c91bfc82c29bcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827064e34563a7f678020ee1fa9b1683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8385c7d5a76dc81c6c1e13dfa7146c7.png)
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6 . (1)按要求作图.四边形
是平行四边形,E为
上一点,且
,作
的平分线
.(仅用无刻度的直尺按要求画图,保留作图痕迹).
(2)请说明第(1)题中作图方法的正确性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
(2)请说明第(1)题中作图方法的正确性.
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7 . 如图,平行四边形
的对角线
,
相交于点
,
过点
且与
、
分别交于点
、
.求证:
.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
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2024八年级下·浙江·专题练习
8 . 在
中,
,
为
上的两点,且
,
.
;
(2)求证:
是矩形;
(3)连接
,若
是
的平分线,
,
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a3600b1760a63a10c9a0429b439dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e153e07a91c773708d981b1d18bbacf8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
(3)连接
![](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/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34157b6a84497f9d18d69fdfe3f2e6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
9 . 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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2024-06-16更新
|
87次组卷
|
34卷引用: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
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(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)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2024年西藏自治区日喀则市萨迦县中考一模数学试题
名校
10 . 如图,已知四边形
的对角线
、
交于点O,
,
且
.
是菱形;
(2)E为
上一点,连接BE,若
,
,
,求
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/7b2fb91028cda3644b82b04da29cbe52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0866e1551b61074ca8e61261ecd1f9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12323eb1e7bdc938d22c4604142cab84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
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