名校
1 . 如图,E是正方形ABCD的边DC上一点,过点A作FA=AE交CB的延长线于点F,若AB=4,则四边形AFCE的面积是( )
![](https://img.xkw.com/dksih/QBM/2022/1/2/2885560190345216/2886351472885760/STEM/82466564-349a-4ff8-b851-a8e887f6aa7e.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2022/1/2/2885560190345216/2886351472885760/STEM/82466564-349a-4ff8-b851-a8e887f6aa7e.png?resizew=140)
A.4 | B.8 | C.16 | D.无法计算 |
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2022-01-03更新
|
301次组卷
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6卷引用:广西壮族自治区贵港市港南区2021-2022学年八年级下学期期中数学试题
广西壮族自治区贵港市港南区2021-2022学年八年级下学期期中数学试题吉林省长春市农安县2021-2022学年八年级上学期期末数学试题湖南省株洲市景弘中学2021-2022学年八年级下学期期中考试数学试题山东省德州市陵城区2021-2022学年八年级下学期期中数学试题辽宁省抚顺市新宾满族自治县2021-2022学年八年级下学期期末数学试题(已下线)专题06 正方形的性质和判定(三大类型)(题型专练)-2023-2024学年八年级数学下册《知识解读·题型专练》(苏科版)
2 . 如图:在△ABC中,∠C=90° AD是∠BAC的平分线,DE⊥AB于E,F在AC上,BD=DF;
求证:(1)CF=EB ;(2)AB=AC+CF.
求证:(1)CF=EB ;(2)AB=AC+CF.
![](https://img.xkw.com/dksih/QBM/2019/4/15/2182858798333952/2184572023308288/STEM/8d3a7cb3c9ec4172acb5336ae302686f.png?resizew=110)
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2016-12-06更新
|
1476次组卷
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16卷引用:【区级联考】广西贵港市港南区2018-2019学年八年级下学期期中考试数学试题
【区级联考】广西贵港市港南区2018-2019学年八年级下学期期中考试数学试题2015-2016学年贵州省都匀市八年级上学期期中统考数学试卷江西省抚州市广昌一中2016—2017学年下学期八年级期中考试数学试卷湖北省荆州市第一中学2017-2018学年八年级上学期期中模拟试题湖北省襄阳老河口市2017-2018学年八年级上学期期中考试数学试题人教版数学八年级上册第12章全等三角形 检测卷湖北省黄冈市黄梅实验中学2017-2018学年八年级(上)期中数学试天津市南开区津英中学 2018-2019学年八年级上册第一次月考数学试题(已下线)《2018-2019学年同步单元双基双测AB卷》 【人教版】 第12章 全等三角形B卷【校级联考】山东省德州市六校2019届九年级10月联考数学试题广东省阳江市第二中学2018-2019学年八年级上学期第一次(10月)月考数学试题安徽省灵璧县黄湾中学2018-2019学年八年级下学期第一次月考数学试题(已下线)期中检测04-2020-2021学年八年级数学上册专项易错混淆真题选(人教版)(已下线)课时12.2 三角形全等的判定-2021-2022学年八年级数学上册链接教材精准变式练(人教版)河南省新乡市原阳县2021-2022学年八年级上学期第二次月考数学试题 山东省德州市平原县第二中学2022-2023学年八年级上学期期中数学试题
3 . 如图,
,
,垂足分别为A,D,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c90da0cd2708481057fe19acebf2ec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/747667c0-e8e2-4ffb-871f-c35c939cfd71.png?resizew=163)
您最近一年使用:0次
2023-08-07更新
|
122次组卷
|
6卷引用:广西壮族自治区柳州市融安县2019-2020学年八年级上学期期中数学试题
名校
4 . 如图,四边形
中,
,
是
上一点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/8229d583-b4b8-4c7f-92f2-f4603c82775c.png?resizew=104)
(1)求证:
;
(2)判断
的形状,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41aba1711910c6f533cc94319104f4fd.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/2291de85a2a29ff360a4515cce99c804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/8229d583-b4b8-4c7f-92f2-f4603c82775c.png?resizew=104)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2ee2509e03d7fe96b83a660a5c6382.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
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2021-03-24更新
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440次组卷
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4卷引用:广西南宁市天桃实验学校2020-2021学年八年级上学期期中数学试题
5 . 如图已知矩形
,
,点
是
的中点,连接
,将
沿
折叠后得到
,延长
交
于点
,连接
.若点
是
的中点,
,求
的长是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae62f70bed27a783f2176279d9fe282c.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/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37dcb0289f28b8e5c6aa8e9c1adb804b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/0f1d3721-22e2-4688-9a14-755161a939b6.png?resizew=152)
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6 . 如图,点
,
在线段
上,
,
于点
,
于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/0a349257-4870-4cba-bd30-eb0358439b91.png?resizew=208)
(1)求证:
;
(2)若
,试判断
的形状并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e6363330b33ca9feda927e6ffd3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e2c2b4ecbbd7084dc5327d74cd6740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324aae9536a57bcaf320795715f20b75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/0a349257-4870-4cba-bd30-eb0358439b91.png?resizew=208)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c10ef52c84726a0a1e9a11c660f921.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bce074d029fd48029eb7275dda15fe8.png)
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名校
7 . 如图,AD是△ABC的角平分线,DF⊥AB,垂足为点F,DE=DG,△ADG和△AED的面积分别为27和16,则△EDF的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/f78da327-3cb7-4e25-96c4-116bcb2a94a3.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/f78da327-3cb7-4e25-96c4-116bcb2a94a3.png?resizew=132)
A.11 | B.5.5 | C.7 | D.3.5 |
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2022-09-15更新
|
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7卷引用:广西壮族自治区钦州市第四中学2022-2023学年八年级上学期10月月考数学试题
8 . 已知四边形
,垂足分别为C、A,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/3ac14f3c-081d-4a01-83e8-bc49648805fe.png?resizew=138)
(1)求证:
.
(2)求证:四边形
是平行四边形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e7a5bb4e8fb89f701a393885822889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/3ac14f3c-081d-4a01-83e8-bc49648805fe.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4658e54355d2ea0c17997ee01349a754.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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2022-08-29更新
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252次组卷
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5卷引用:广西壮族自治区桂林市恭城瑶族自治县2021-2022学年八年级下学期期末数学试题
广西壮族自治区桂林市恭城瑶族自治县2021-2022学年八年级下学期期末数学试题(已下线)专题18.1.2 平行四边形的判定(知识解读)-2022-2023学年八年级数学下册《同步考点解读·专题训练》(人教版)(已下线)专题9.4 平行四边形的判定(知识解读)-2022-2023学年八年级数学下册《同步考点解读·专题训练》(苏科版)(已下线)专题6.1 平行四边形的性质和判定(知识解读)-2022-2023学年八年级数学下册《同步考点解读·专题训练》(北师大版)(已下线)专题4.4 平行四边形的判定定理(知识解读)-2022-2023学年八年级数学下册《同步考点解读·专题训练》(浙教版)
9 . 如图,在
,
,E是
上一点,且
,
于点E,若
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1ac3ab8d3ce5e61fd2f89761f80976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebc359166c408c16803f160e73b099e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/18/5247365c-9df6-4e2f-9d8b-778dd67b1c89.png?resizew=134)
您最近一年使用:0次
2023-10-13更新
|
109次组卷
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4卷引用:广西壮族自治区南宁市兴宁区第四十九中学2023-2024学年八年级上学期第一次月考数学试题
10 . 【综合与实践】
课本64页安排这样的数学活动:折纸作
,
,
的角:如果我们身旁没有量角器或者三角尺,又需要做
,
,
等大小的角,可以采用下面的方法:
动手操作:如图1,(1)对折矩形纸片
,使
与
重合,得到折痕
,把纸片展开;(2)再一次折叠纸片,使点A落在
上,并使折痕经过点B,得到折叠
,同时得到线段BN.
观察猜想:图中等于
的角是:______(写出一个角即可);等于
的角是:______(写出一个角即可)
推理验证:任选以上一个猜想结论给予证明.
拓展延伸:将矩形纸片换成正方形纸片,按以上步骤折叠,并延长
交
于点Q,连接
得到图2,若
,直接写出
的长.
课本64页安排这样的数学活动:折纸作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
动手操作:如图1,(1)对折矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
观察猜想:图中等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
推理验证:任选以上一个猜想结论给予证明.
拓展延伸:将矩形纸片换成正方形纸片,按以上步骤折叠,并延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5c276923c1a46eaf18193604fdb6b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/9ef52a7f-8e90-4074-8afe-f833ccc91f9d.png?resizew=364)
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