如图,已知点B、C在线段
的异侧,连接
,点E、F分别是线段
上的点,连接
,分别与
交于点G,H,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/c76a9025-663e-4304-87a1-65ee23635e0f.png?resizew=179)
(1)求证:
;
(2)若
,求证:
;
(3)在(2)的条件下,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85814f051a479a1b04a46f70e96557a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85814f051a479a1b04a46f70e96557a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b075e73896d0bb82e6c0a06bdfb2046e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d373f72060450fe8f7ec665cb09426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66215405835d7fb8fc423f8066d2a60.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/c76a9025-663e-4304-87a1-65ee23635e0f.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95312bde51ced84a470efc95f90fdf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f5023bb8fb1e17e5f68b6afbf571a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35adeb057595dd77b0e7cd8801183d4.png)
21-22七年级下·陕西渭南·期中 查看更多[14]
陕西省渭南市潼关县2021-2022学年七年级下学期期中考试数学试题(已下线)5.3.1平行线的性质重难点专项练习【六大题型】-2022-2023学年七年级数学下册同步精品课堂(人教版)(已下线)专题5.12 平行线的性质(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(人教版)(已下线)专题2.12 平行线的性质(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)(已下线)专题1.8 平行线的性质(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(浙教版)(已下线)专题7.6 探索平行线的性质(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(苏科版)(已下线)第二章 相交线与平行线 章末检测卷-2022-2023学年七年级数学下册重难题型全归纳及技巧提升专项精练(北师大版) 陕西省渭南市大荔实验中学2021-2022学年七年级下学期第一次月考数学试卷 (已下线)第二章 相交线与平行线(单元测试)-2022-2023学年七年级数学下册同步精品课堂(北师大版)(已下线)【期中测试】满分预测押题卷(B卷·能力提升练)(考试范围:第一章~第三章)-【单元测试】2022-2023学年七年级数学下册分层训练AB卷(北师大版)江苏省连云港市海州区2022-2023学年七年级下学期期中数学试题(已下线)专题10.12 平行线的性质(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(沪科版)广东省茂名市高州市第一中学附属实验中学2022-2023学年七年级下学期4月期中数学试题(已下线)NYtjzxsxrj7x69.pdf
更新时间:2022-12-15 23:16:47
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】【问题背景】
(1)如图1的图形我们把它称为“8字形”,请说理证明∠A+∠B=∠C+∠D
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/6fca22d4-df85-4c21-9855-1f25cb0bcf7f.png?resizew=89)
【简单应用】
(2)如图2,AP、CP分别平分∠BAD、∠BCD,若∠ABC=28°,∠ADC=20°,求∠P的度数(可直接使用问题(1)中的结论)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/ef65a316-3f0a-4c0e-9158-ec99b7db011c.png?resizew=99)
【问题探究】
(3)如图3,直线BP平分∠ABC的外角∠FBC,DP平分∠ADC的外角∠ADE,若∠A=30°,∠C=18°,则∠P的度数为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/29fd893a-d44f-4aab-830a-e1874245eeb1.png?resizew=147)
【拓展延伸】
(4)在图4中,若设∠C=x,∠B=y,∠CAP=
∠CAB,∠CDP=
∠CDB,试问∠P与∠C、∠B之间的数量关系为 (用x、y表示∠P)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/ab185e1d-242d-476d-ae58-bf2cde45abde.png?resizew=160)
(5)在图5中,BP平分∠ABC,DP平分∠ADC的外角∠ADE,猜想∠P与∠A、∠C的关系,直接写出结论 .
(1)如图1的图形我们把它称为“8字形”,请说理证明∠A+∠B=∠C+∠D
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/6fca22d4-df85-4c21-9855-1f25cb0bcf7f.png?resizew=89)
【简单应用】
(2)如图2,AP、CP分别平分∠BAD、∠BCD,若∠ABC=28°,∠ADC=20°,求∠P的度数(可直接使用问题(1)中的结论)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/ef65a316-3f0a-4c0e-9158-ec99b7db011c.png?resizew=99)
【问题探究】
(3)如图3,直线BP平分∠ABC的外角∠FBC,DP平分∠ADC的外角∠ADE,若∠A=30°,∠C=18°,则∠P的度数为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/29fd893a-d44f-4aab-830a-e1874245eeb1.png?resizew=147)
【拓展延伸】
(4)在图4中,若设∠C=x,∠B=y,∠CAP=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/ab185e1d-242d-476d-ae58-bf2cde45abde.png?resizew=160)
(5)在图5中,BP平分∠ABC,DP平分∠ADC的外角∠ADE,猜想∠P与∠A、∠C的关系,直接写出结论 .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/88ef75c6-89c2-402d-92eb-c234920dd0f7.png?resizew=136)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图,点B,E分别在直线AC和DF上,若∠AGB=∠EHF,∠C=∠D
求证:∠A=∠F
证明:∵∠AGB=∠EHF(已知)
∠AGB=∠FGD ( )
∴∠EHF= (等量代换)
∴DB∥EC ( )
∴∠ =∠DBA ( )
∵∠C=∠D
∴ ( )
∴ ∥ ( )
∴∠A=∠F ( )
求证:∠A=∠F
证明:∵∠AGB=∠EHF(已知)
∠AGB=∠FGD ( )
∴∠EHF= (等量代换)
∴DB∥EC ( )
∴∠ =∠DBA ( )
∵∠C=∠D
∴ ( )
∴ ∥ ( )
∴∠A=∠F ( )
![](https://img.xkw.com/dksih/QBM/2020/8/11/2525325295353856/2531117232766976/STEM/87cc470742984452903783b33b552054.png?resizew=173)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】【阅读理解】
我们经常过某个点作已知直线的平行线,以便利用平行线的性质来解决问题.
例如:如图1,
,点
、
分别在直线
、
上,点
在直线
、
之间,设
,
,求证:
.
作
,
∴
,
∵
,
,
∴
,
∴
,
∴
.
即
.
可以运用以上结论解答下列问题:
【类比应用】
(1)如图3,已知
,已知
,
,求
的度数;
(2)如图4,已知
,点
在直线
上,点
在直线
上方,连接
、
.设
、
,则
、
、
之间有何数量关系?请说明理由.
(3)如图5,已知
,点
在直线
上,点
在直线
上方,连接
、
,
的角平分线与
的角平分线所在直线交于点
,求
的度数.
我们经常过某个点作已知直线的平行线,以便利用平行线的性质来解决问题.
例如:如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/3ba2988c8fc7fe8d0e97793c1508a703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6052d6aaf8c5dd3648852498fb4bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eafeabe69b48875e2b2f6043dd3354b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4635b3ba280ea836f37948e70f039103.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d357c8177bfe2c0e4613f9f3c972fe4b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4635b3ba280ea836f37948e70f039103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10bb426e00de29d8664ca5babb2f4f3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f61d120dd75e72df103cd991973c37e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc074cfd1272831d1c8e9e6047b14d.png)
即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eafeabe69b48875e2b2f6043dd3354b.png)
可以运用以上结论解答下列问题:
【类比应用】
(1)如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a9d4526ddf01eb414b7257661799b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e226c419e6829955f1d2416f2fcb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
(2)如图4,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6cf66ad93b3b3c3fec5fd70ef1fbea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e8ad97881c565b06e176dd14f09700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15417741fba20d681ab4414b07339099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
(3)如图5,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635c966b753b329ea7441a9e1db13d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bafaec1cbb31d644a0df6bbd4fe4f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/506f620f523e70e74c064aaa31c39524.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图①,在平面直角坐标系中,已知A(a,0),C(2,b),且满足
,过点C作BC⊥x轴于点B.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/573a6dfa-190f-4ece-8c58-858ea41af1f2.png?resizew=531)
(1)填空:a= ,b= ;
(2)如图②,过点B作BD//AC轴交y轴于点D,且AE,DE分别平分∠CAB,∠ODB,求∠AED的度数;
(3)如图③,在y轴上是否存在点P,使得三角形ABP的面积与三角形ABC的面积相等?若存在,求出P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd520abfc99b7cc15650575ef419396f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/573a6dfa-190f-4ece-8c58-858ea41af1f2.png?resizew=531)
(1)填空:a= ,b= ;
(2)如图②,过点B作BD//AC轴交y轴于点D,且AE,DE分别平分∠CAB,∠ODB,求∠AED的度数;
(3)如图③,在y轴上是否存在点P,使得三角形ABP的面积与三角形ABC的面积相等?若存在,求出P的坐标;若不存在,请说明理由.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
,BE平分
,DF平分∠ADC,∠1=∠2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/20/3d44247f-4cbb-4d3d-83f4-6cb56f9a73cc.png?resizew=140)
(1)AD与BC平行吗?请说明理由;
(2)AB与CD平行吗?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb34d917a073024625616e4edf22016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/20/3d44247f-4cbb-4d3d-83f4-6cb56f9a73cc.png?resizew=140)
(1)AD与BC平行吗?请说明理由;
(2)AB与CD平行吗?请说明理由.
您最近一年使用:0次