如图,
,
,
,点D在边
上,
与
相交于点O;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/f329d035-7a94-4690-8c22-3ef09f100f36.png?resizew=196)
(1)求证:
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b4908b37cf23de34d38ae7a0bff278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/f329d035-7a94-4690-8c22-3ef09f100f36.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/528fa89492fc43b433557508fff7a19a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a166225f9ada66c353e21ee2262d42c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
更新时间:2023-12-09 21:01:28
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】在△ABC中,CD⊥AB于D,CE是∠ACB的平分线, ∠A=20°,∠B=60°;求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/ee0cd84c-fb06-4ab8-985f-18255b1d1c38.png?resizew=219)
(1)求∠ACB的度数.
(2)∠BCD 的度数;
(3)∠ECD的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/ee0cd84c-fb06-4ab8-985f-18255b1d1c38.png?resizew=219)
(1)求∠ACB的度数.
(2)∠BCD 的度数;
(3)∠ECD的度数.
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】已知:如图,AD是△ABC的角平分线,点E在BC上,点F在CA的延长线上,EF交AB于点G,且∠AGF=∠F.求证:EF∥AD.
![](https://img.xkw.com/dksih/QBM/2022/1/28/2904436572520448/2904764931268608/STEM/495dda56637a449e8cae81bc3d4a340b.png?resizew=130)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】如图,已知A、B、C、D在一条直线上,
,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751ecec223e69ea940ffe196aa1463ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ffdbedb829c8453b62012f82f8eddd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b333110550208ffce4ec642f78075f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b4ebd1d0-334d-4b06-a596-0f5ea8af09b6.png?resizew=213)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】如图,在
中,
为
的中点,
过点
,分别交
,
的延长线于点
,
.
(1)求证:四边形
是平行四边形.
(2)若
平分
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/27/dfe7ee96-7e34-4c94-a7ca-4342c9ba0f78.jpg?resizew=161)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9766e5eb6796dafc5ffe212afdfc43c0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060705794ef87cc71dac40c57f27b1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271ba591a8451e5066e9181c40c67085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
您最近一年使用:0次