名校
1 . 如图,在
中,
为边
上的高,点
为边
上的一点,连接
.
为边
上的中线时,若
,
的面积为
,求
的长;
(2)当
为
的角平分线时,若
,
,求
的度数.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e60fbe6820130fb20abc555a94b5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac39fdf5a33514e57779b3ce2697936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce6c8659bfef1f79b0796d500b924a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
您最近一年使用:0次
2024-04-15更新
|
509次组卷
|
13卷引用:陕西省渭南市韩城市2023-2024学年八年级上学期期中数学试题
陕西省渭南市韩城市2023-2024学年八年级上学期期中数学试题陕西省延安中学2023-2024学年八年级上学期第四次月考数学试题江苏省连云港市灌南县2022-2023学年七年级下学期期中数学试题江苏省连云港市赣榆区赣榆实验中学2022-2023学年七年级下学期期中数学试题重庆市万州区2022-2023学年七年级下学期期末数学试题河北省廊坊市安次区第五中学2023-2024学年八年级上学期月考数学试题内蒙古自治区通辽市科尔沁左翼中旗科尔沁左翼中旗教研室2023-2024学年八年级上学期期中数学试题江苏省无锡市滨湖区2021-2022学年七年级下学期期中数学试题四川省内江市2021-2022学年七年级下学期期末数学试题河北省邢台市开元中学2021-2022学年七年级下学期第二次月考数学试题沪科版数学八年级上册第13章 三角形中的边角关系命题与证明单元测试2024学年江苏省宜兴市桃溪中学教育联盟七年级下学期延时作业检查数学模拟试题(已下线)第04讲 认识三角形(5大考点+5种题型+强化训练)-【帮课堂】2023-2024学年七年级数学下册同步学与练(苏科版)
2 . 如图,在
中,
平分
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229f378b4303c1582f3fddcc363c06e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329043debbbb37c0928ea296c8950f78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/3f42a737-3b52-4756-b1a2-1302db50cd47.png?resizew=178)
您最近一年使用:0次
2024-04-04更新
|
38次组卷
|
3卷引用:陕西省渭南市澄城县2023-2024学年八年级上学期期中数学试题
3 . 如图,在
中,
,
,
平分
,交
于点E,交
于点F,若
,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/a93c8d56-bd36-40ee-b35e-08abfb8f2dc7.png?resizew=193)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620fd368efb51a5ae90c0f3e276704d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/a93c8d56-bd36-40ee-b35e-08abfb8f2dc7.png?resizew=193)
A.![]() | B.4 | C.6 | D.![]() |
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4 . 【问题呈现】
小明在学习中遇到这样一个问题:如图1,在
中,
,
平分
,
于D,猜想
、
、
的数量关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/65ef035d-70e8-4734-aa0a-8d77b651ddb8.png?resizew=378)
(1)小明阅读题目后,没有发现数量关系与解题思路.于是尝试代入∠B、∠C的值求∠EAD的值,得到下面几组对应值:
求上表中a的度数,并判断
与
、
的数量关系;
【变式应用】
(2)小明继续研究,在图2中,
,
,其他条件不变,若把“
于D”改为“F是线段
上一点,
于D”求
的度数,并写出
与
、
的数量关系.
小明在学习中遇到这样一个问题:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6f337c00a6d4bf1e7580d8888db3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/65ef035d-70e8-4734-aa0a-8d77b651ddb8.png?resizew=378)
(1)小明阅读题目后,没有发现数量关系与解题思路.于是尝试代入∠B、∠C的值求∠EAD的值,得到下面几组对应值:
| 10 | 30 | 30 | 20 | 20 |
| 70 | 70 | 60 | 60 | 80 |
| 30 | 15 | 20 | 30 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
【变式应用】
(2)小明继续研究,在图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19766bbdc2d23ae20e9f34530c3a1543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991d28fec5464134cececebc681e54ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4567ae3f7827588855f39569d4f7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c19410c7abeae002ca97cfad4c791f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c19410c7abeae002ca97cfad4c791f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
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5 . 如图,在
中,
,
分别平分
和
,
相交于点F,求
的度数.
![](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/eb0032f850bd19a3af6c44c416b0a2aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0032f850bd19a3af6c44c416b0a2aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36719f1e764ee0e719b65c49fae84677.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/ed6efe1f-ed8a-4c36-b11a-e5043d09e27e.png?resizew=205)
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6 . 如图,在
中,
是
边上的高线,
是
的平分线,则
的度数为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94481ad5d2e00a225cd3d600cc36047d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/4109a422-55e5-4c3a-ba2f-b49c9bf405b2.png?resizew=176)
您最近一年使用:0次
7 . 如图,在
中,
,
、
为
的角平分线.
与
相交于点F,
平分
,有下列四个结论:①
;②
;③
;④若
,
.所有正确的结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/3e51d3ad-16d8-4653-bfad-0f3f55831bc2.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77282d5b97a60264cf15fb74b48e4b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756eb9a840789a7b4b265aa5b2d2958a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84884af48ce8f3be4f5ec352ee824f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95ed47fc8a70cb884e9ddd4bb69be5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/3e51d3ad-16d8-4653-bfad-0f3f55831bc2.png?resizew=149)
A.①③ | B.②③④ | C.①③④ | D.①②③④ |
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8 . 如图,在
中,
,
平分
交
于点D,点E为
的延长线上一点,过点E作
于点F,若
,则
的度数为________ .(用含
的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d00f4651b343dd8f9060c6460f0c955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148cdaa1d55e9a3d940a4af77610cade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/0ca55edb-7ff7-4782-b6e0-41d7c519b429.png?resizew=190)
您最近一年使用:0次
2024-01-23更新
|
67次组卷
|
3卷引用:陕西省渭南市富平县2023-2024学年八年级上学期期末数学试题
陕西省渭南市富平县2023-2024学年八年级上学期期末数学试题陕西省汉中市洋县2023-2024学年八年级上学期期末数学试题(已下线)第7章 平面图形的认识(二)(单元测试·综合卷)-2023-2024学年七年级数学下册基础知识专项突破讲与练(苏科版)
名校
9 . 如图,在
中,
,
,
平分
的外角
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
________ .
![](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/65c5840e0454fdec7d2158072c43b8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/e612e302-a810-4acd-bbdf-60a6bc66fd09.png?resizew=137)
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2024-01-11更新
|
53次组卷
|
9卷引用:陕西省西安市碑林区西安市第二十六中学2022-2023学年七年级下学期5月月考数学试题
陕西省西安市碑林区西安市第二十六中学2022-2023学年七年级下学期5月月考数学试题2023年广东省河源市龙川县中考一模数学试卷(已下线)专题5.12 简单的轴对称图形(等腰三角形)(巩固篇)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)广东省湛江市廉江市第四中学2023-2024学年八年级上学期期中数学试题吉林省吉林市昌邑区第九中学2023-2024学年八年级上学期期中数学试题广东省湛江市霞山区港城中学2023-2024学年八年级上学期期中数学试题吉林省松原市长岭县2023-2024学年八年级上学期期末数学试题2022年广东省珠海市斗门区中考一模数学试卷2022年广东省汕头市濠江区中考二模数学试题
名校
10 . 如图,A,B分别是
两边
,
上的动点(均不与点O重合).
(1)如图1,当
时,
的外角
,
的平分线交于点C,则
______
;
(2)如图2,当
时,
,
的平分线交于点D,则
______
(用含n的式子表示);
(3)如图3,当
(α为定值,
)时,
是
的平分线,
的反向延长线与
的平分线交于点F.随着点A,B的运动,
的大小会改变吗?如果不会,求出
的度数(用含α的式子表示);如果会,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/ad08a072-fc27-4156-a5b0-70a97036b5ea.png?resizew=333)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f972b2d55be4a1dce2afeb5c8e99d07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003f212e50c288dc51764ca0a919d5a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df92344b00e2aa8e7f0d1fa997b9dd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41db498f025052df2dbb1e50ab672675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3148894e0db3624ac9826394b6e065.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/acb663fe83b1f7e93e13d91cc6460f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a84261efd0ff6fafdc55cd446c1a5f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003f212e50c288dc51764ca0a919d5a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daae8ec60b2b1f7577dee687247cebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
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2024-01-08更新
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5卷引用:陕西省榆林市榆阳区第十中学2023-2024学年八年级上学期期末数学试题
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