如图,锐角
的两条角平分线
,
相交于点
,连接
,且
.
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694797756465152/2703741819248640/STEM/9096b53f-ca2a-411b-b75c-c1dccf407959.jpg?resizew=116)
(1)求证:
是等腰三角形;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694797756465152/2703741819248640/STEM/9096b53f-ca2a-411b-b75c-c1dccf407959.jpg?resizew=116)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcc960364ba71da42fcab71795ab5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a457b899731577bfe61dda594ae4eec4.png)
更新时间:2021-04-20 09:19:43
|
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解答题-问答题
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(0.85)
【推荐1】如图,已知
,点E在
上,
与
相交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/4aec44e6-f0fa-40be-aa04-21228d0e9586.png?resizew=120)
(1)若
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,求线段
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(2)已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b15038cde7a33b018953d9b115d2a90.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/4aec44e6-f0fa-40be-aa04-21228d0e9586.png?resizew=120)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea147ada4f0aefdd3808a6a1133792eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae54a216ed6a5bc56af1f501426ca438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
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解答题-证明题
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(0.85)
【推荐2】在
中,
,
,
为边
延长线上一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/2c31825d-e9b6-4253-ba43-bf6fe5b497e4.png?resizew=474)
(1)如图1,当
时,求证:
;
(2)如图2,当
时,求证:
;
(3)如图3,当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb06fb8ec495ec948ae5fe29f3cf24b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/2c31825d-e9b6-4253-ba43-bf6fe5b497e4.png?resizew=474)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d66e2111f4ba89416cade42abb3ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/525b212fc8e4a6e4e3238ef3037831e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206a81c66c1db8537a25059098f22a5d.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d66e2111f4ba89416cade42abb3ebe.png)
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名校
【推荐1】已知,如图,A、D、C、B在同一条直线上AD=BC,AE=BF,CE=DF,求证:DF∥CE
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解答题-作图题
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名校
【推荐1】如图,在
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/18f4c44e-0317-4df5-b53c-cb657a08f59a.png?resizew=146)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e95be88bc79b3c7e72d349c4cb3c88d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/18f4c44e-0317-4df5-b53c-cb657a08f59a.png?resizew=146)
(1)用尺规完成以下基本图形:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)在(1)所作的图形中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dd0dc47efa9e663001492b69b60b93.png)
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【推荐2】在
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