填空完成以下证明:
已知如图,
,
,
于点H,求证:
.
(已知),
∴
___________.
∵
(已知),
∴
( ),
∴∠2=___________( ).
∵
(已知),
∴∠3=___________( ),
∴
( ).
∴
___________( ),
∴
.
已知如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cecb98f2569e9c8fc6b29b2e5fece38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba02910a01689f636c71116e96dfdf33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bb5ccceb997622add983ee2dc68522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bb5ccceb997622add983ee2dc68522.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2485b9b0a8f7703bcfa69f160c540a9f.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cecb98f2569e9c8fc6b29b2e5fece38.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
∴∠2=___________( ).
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba02910a01689f636c71116e96dfdf33.png)
∴∠3=___________( ),
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8a7a03c728c9d205c63f8b06bab658.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b25b0d0f3e993e186f6c3bb5f55bad9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
2023七年级下·全国·专题练习 查看更多[13]
(已下线)专题5.2 平行线及其判定(专项训练)-2022-2023学年七年级数学下册《同步考点解读·专题训练》(人教版)(已下线)专题1.3 平行线的判定(专项训练)-2022-2023学年七年级数学下册《同步考点解读·专题训练》(浙教版)(已下线)专题7.1 探索直线平行的条件(专项训练)-2022-2023学年七年级数学下册《同步考点解读·专题训练》(苏科版)山西省吕梁市兴县初级中学2021-2022学年七年级下学期期中数试题甘肃省陇南市西和县2022-2023学年七年级下学期4月期中数学试题广东省佛山市禅城区佛山荣山中学2022-2023学年七年级下学期期中数学试题黑龙江省绥化市安达市老虎岗镇文化中学2022-2023学年七年级下学期5月期中数学试题辽宁省大连市西岗区第三十七中学2021-2022学年七年级下学期4月月考数学试题(已下线)专题01 探索直线平行的条件(五大题型)(题型专练)-2023-2024学年七年级数学下册《知识解读·题型专练》(苏科版)广东省深圳市龙华区行知中学2022-2023学年七年级下学期期中数学试题山西省晋中市左权县2023-2024学年七年级下学期月考数学试题内蒙古自治区呼伦贝尔市阿荣旗阿荣旗阿伦中学2023-2024学年七年级下学期3月月考数学试题江西省吉安市十校联盟2023-2024学年七年级下学期期中数学试题
更新时间:2023-05-06 22:48:11
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