1 . 如图,图中两条弦
相交于点E,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d00572a90232e08932317af2a53767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/0e1ff1e6-eeba-4318-84a0-9519877daa0d.png?resizew=174)
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3卷引用:2022年宁夏固原市原州区三营中学中考数学模拟试卷
名校
2 . 如图,
,
,
,试找出图中其他线段的相等关系,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03687d97d61b4a7cecbb73f2a6604212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed619e2dc900c52a29012e5b821451bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/e009f80e-2ad6-400a-a7a7-8eedb2afcd25.png?resizew=243)
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3 . 如图,
为平行四边形
的对角线.
(1)实践与操作:利用尺规作对角线
的垂直平分线,分别交
于点E,F,O(要求:尺规作图并保留作图痕迹,不写作法,标明字母);
(2)猜想与证明:连接
.试猜想四边形
是什么特殊四边形?并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/2725ee59-55b4-4e28-a3e6-466a216a2ad4.png?resizew=192)
(1)实践与操作:利用尺规作对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1ecefcd888e9495e9b3f549bff82ef.png)
(2)猜想与证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf22927eb6819a02978ef0c6b101f6f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
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4 . 如图,
,
,点E和点F在线段
上,
.问题:
与
有怎样的数量关系?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439fbb8974a5f907205d26b47b420bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/5/4ae4aaae-7b9b-44bc-993f-9a453a585860.png?resizew=164)
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2卷引用:宁夏回族自治区固原市西吉县西吉县第五中学2022-2023学年八年级上学期期中数学试题
2023八年级下·江苏·专题练习
5 . 如图(1),已知△ABC中,
,
,
是过A的一条直线,且
在
的异侧,
于D,
于E
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/35879b6a-a21d-46b4-9fd0-c84ced62cced.png?resizew=582)
(1)试说明:
.
(2)若直线
绕
点旋转到图2位置时(
),其余条件不变,问
与
的关系如何?请直接写出结果;
(3)若直线
绕
点旋转到图:位置时(
),其余条件不变,问
与
、
的关系如何?请直接写出结果,不需说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a93d2a33c0980d8a9926d131101d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34b4c25ed355ce6a9c2bfb689b51538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd469ad63459699654e5909e0230c02a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/35879b6a-a21d-46b4-9fd0-c84ced62cced.png?resizew=582)
(1)试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27ce417a25421765b0d09f3ff75f27.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52249f2f054dca0b0c6254433540935.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb1ddfa93349e797fc589bdf92e40d1.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb321e7c4ab6fdd8580db605e072c972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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6 . 如图,已知C是线段
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/25d8a5ef-1895-4e74-bc6a-15ebc0a7d544.png?resizew=150)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
(2)当
,
时,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd6fe78f6cfdfefd6d8be45473b25b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d32ac820e9ab572690649f16b87aa273.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/25d8a5ef-1895-4e74-bc6a-15ebc0a7d544.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fda9ea183d8935fea806375591f866c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73bcf64e1ccd6238766aaf8708da1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
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7 . 如图,平面直角坐标系中,在
轴正半轴截取线段
,在
轴负半轴截取线段
,使
,连接
,
、
分别是
、
内部一条射线,分别交
、
于
、
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8fde0f6c-9324-432e-8fdb-9010da2296cb.png?resizew=471)
(1)如图
,若
,且
、
分别平分
、
,作
交
于点
,交
于点
,再过点
作
,交
于
,交
于
,交
的延长线于点
.
①求出点
的坐标;
②证明:
是等腰
,并直接写出点
的坐标;
(2)如图
,若
,请写出线段
、
与
之间的数量关系,并证明你的结论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daae8ec60b2b1f7577dee687247cebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9341d51c827a29a4a0b0b3dded16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8fde0f6c-9324-432e-8fdb-9010da2296cb.png?resizew=471)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c24c212cb0112a29270504f45388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daae8ec60b2b1f7577dee687247cebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9341d51c827a29a4a0b0b3dded16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16821c27ebd069f2623494bd942b295e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f47feb4cabc74b7c3a994476db9113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①求出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e1a61098688069dd7730d3eb7f91a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ca0b3b0631e9760b0cdac592f8b909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2032fccdf9ab12429aae024d67b19d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
您最近一年使用:0次
2022-12-12更新
|
123次组卷
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2卷引用:2022年宁夏固原市原州区三营中学中考数学模拟试卷
8 . 如图,
中,
、
为对角线,
,
边上的高为4,则阴影部分的面积为( )
![](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/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/3/c8cf498d-9152-4173-8136-456efef11140.png?resizew=135)
A.3 | B.6 | C.12 | D.24 |
您最近一年使用:0次
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11卷引用:宁夏回族自治区吴忠市宁夏同心思源实验学校2021-2022学年八年级下学期期中数学试题
宁夏回族自治区吴忠市宁夏同心思源实验学校2021-2022学年八年级下学期期中数学试题宁夏回族自治区固原市原州区2020-2021学年八年级下学期期末数学试题(已下线)第17课 中心对称与中心对称图形-【帮课堂】2022-2023学年九年级数学上册同步精品讲义(人教版)重庆市梁平区2019-2020学年八年级下学期期末数学试题河北省2020-2021学年八年级下学期期中数学试题人教版八年级下 第十八章 平行四边形 18.1.1 平行四边形的性质(3)(已下线)【新东方】 初中数学20210622-040【初二下】河北省唐山市古冶区2022-2023学年八年级下学期期中数学试题湖南省衡阳师范学院祁东附属中学2022-2023学年八年级下学期期中数学试题福建省南平市建阳区第三中学2020-2021学年八年级下学期第一次月考数学试题(已下线)YHmlsjsxBS831 .pdf
9 . 如图,在
中,
于点E,
于点D,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0986444e745d34fbd5f2fd20fc888658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd5c41c921836b50f8e18abfdc5df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6996aa31bf1486ced60c2249a6e6989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9320945b6790c368d70cf770ec21e3fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/56d372ae-654f-4e02-aa7d-94dd92c54771.png?resizew=114)
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10 . 如图:在
中,
,D为
边的中点,过点D作
于点E,
于点F.
;
(2)若
,求
的周长.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbabdda5c857964f673f975f9b3ff8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2022-12-09更新
|
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4卷引用:宁夏回族自治区石嘴山市大武口区第九中学2022-2023学年八年级上学期期中数学试题
宁夏回族自治区石嘴山市大武口区第九中学2022-2023学年八年级上学期期中数学试题北京市第二十中学2022-2023学年八年级上学期12月月考数学试卷宁夏回族自治区吴忠市利通区第六中学2023-2024学年八年级上学期期中质量监测数学试卷(已下线)第一章第07讲 解题技巧专题:利用等腰三角形的'三线合一'作辅助线(3类热点题型讲练)-【帮课堂】2023-2024学年八年级数学下册同步学与练(北师大版)