如图,已知
,
平分
,
平分
.
(1)求证:
.
(2)若
,则
________.(用含
的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca14fa885a9d04f04e0418b49b118241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302efd5266f7868d8c67f7bb09dc2ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/98945735-7234-48c2-b58c-3be259877fd1.png?resizew=107)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d2e5e5ec3caea31e3928183eebbc2b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37afc946d13728fb0f670847dfd2b687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afde09d82ae96f00c135732baee64776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
更新时间:2023-06-08 11:16:01
|
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解答题-证明题
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【推荐1】如图,
是
的角平分线,
,垂足分别是点
与
相交于点
,连接
.问:
与
垂直吗?若垂直,请证明;若不垂直,请说明理由.
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您最近一年使用:0次
解答题-作图题
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【推荐2】下面是小马虎解的一道题:
题目:在同一平面上,若
,
,
是
的角平分线,求
的度数.
解:根据题意可画出图形,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/f7502711-898d-4353-a3ec-66bba749cbde.png?resizew=134)
,
∵
,
是
的角平分线,
∴
,
∴
.
若你是老师,会判小马虎满分吗?
若会,说明理由.若不会,请将小马虎的错误指出,并给出你认为正确的解法.
题目:在同一平面上,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca87d9058cf6b86aa672842cd33b075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db91877e869a8d58b2bab2c39756d7fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9de708d1544ebe0b82e7e6e2102382.png)
解:根据题意可画出图形,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/f7502711-898d-4353-a3ec-66bba749cbde.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89feba9c4b9d4ef612e73b0c669ff25a.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210d4d13c1050456fda02ed137f6d529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c452cf626428d1c0341ff113505edd2.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26f58c31494ec9a2d678c7a0547b0a4.png)
若你是老师,会判小马虎满分吗?
若会,说明理由.若不会,请将小马虎的错误指出,并给出你认为正确的解法.
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解答题-证明题
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【推荐1】如图,四边形
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您最近一年使用:0次
解答题-证明题
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较易
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名校
【推荐2】已知:如图,点
在同一条直线上,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4655d1be8ed9074f9136a3a0e7b5a40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f40b3bf6b27f936e0747de92151a1f77.png)
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求证:
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解答题-作图题
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较易
(0.85)
【推荐2】如图,已知
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