如图,已知点A在射线
上,
,
,
.试说明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85b53a74e2a952b581700c83bbcd25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d137ddc050f11f1784916c39e96d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c41158715d94c6c9ffebdee957d2618.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/10/e4e8c3d9-b418-4693-8c07-d2b93b05485c.png?resizew=150)
更新时间:2023-09-09 11:15:20
|
【知识点】 根据平行线判定与性质证明
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】填空完成推理过程:
如图,直线
,
交于点
,
,
,
.求证:
.
(已知),
∴
(____________).
∵
(已知),
∴
______(等量代换).
∵
(已知),
∴
(等式的性质),
即
,
∴
______(等量代换),
∴
(____________).
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682dc163baa74e18746d3d52da6cff7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dfa223e7b272346649538457c976864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228c79b87844cb048f751817abdd3bbd.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682dc163baa74e18746d3d52da6cff7e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc9039f5759f8e555262e1f8c03ef3d.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1dc5e91711cd3247e673885b043a1c8.png)
即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bc939ef2208ac7c9c07b2cca587abd.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc9039f5759f8e555262e1f8c03ef3d.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dfa223e7b272346649538457c976864.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】完成下面的证明:
如图,
,
,
,求证:
.
![](https://img.xkw.com/dksih/QBM/2021/3/17/2679653810446336/2682810361143296/STEM/81361c21-a81b-4e35-a888-bb4a25035328.png?resizew=255)
证明:∵
,
(已知),
∴
,
,
∴
,
∴
( ),
∴
( ),
∵
(已知),
∴
,
∴
( ).
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1c8f2b41267f56c55a9d3adc0d1538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a200fc6444157edf072e9557d1ca777.png)
![](https://img.xkw.com/dksih/QBM/2021/3/17/2679653810446336/2682810361143296/STEM/81361c21-a81b-4e35-a888-bb4a25035328.png?resizew=255)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2556d8a3c762f55138aa3afceedd72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05dbd3592cbe9d7298a30f19c20c5a8e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eee13dc73acd5f8c887c595087596ba.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dced11455b3e31a9090915f80a046fa3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/981b353a35f99faf6b315b76134eed8c.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd2e599ebb7a0a1c13a0b4b228f5156.png)
您最近一年使用:0次