已知:如图,在
中,
.
(1)求证:
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/ee3b49f2-431a-41d9-be10-4f45c7481f0b.png?resizew=106)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4ff0d3e24d9fee26178607f8c3afa6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef6c072a62ecb19586630ba82163589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ad1694fc61e199bbc6b51f1434baf5.png)
更新时间:2024-04-01 22:35:40
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适中
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【推荐1】如图,AD⊥BC,垂足为D,CD=1,AD=2,BD=4.
(1)求AB、AC的长;
(2)求∠BAC的度数.
(1)求AB、AC的长;
(2)求∠BAC的度数.
![](https://img.xkw.com/dksih/QBM/2020/3/29/2429995171127296/2431466846887936/STEM/12e982512b3345718e8b32c5dbf94e7d.png?resizew=142)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】如图,已知E是正方形
的边
上的一点,延长
到点F使
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/5da9dae6-63ec-4ce5-a0b4-6db987fc73d6.png?resizew=118)
(1)能通过旋转
得到
吗?说明理由.
(2)连接
,过点D作
垂直
于点M,交
于点N.若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/5da9dae6-63ec-4ce5-a0b4-6db987fc73d6.png?resizew=118)
(1)能通过旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13668f033d00acfc366f7e47949c4462.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1b3c262e8bf58c8479708d7496bbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d1abb67e2ff0ffd82a5e81f5d483d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在
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,
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![](https://img.xkw.com/dksih/QBM/2023/4/28/3226075455234048/3227783018332160/STEM/508e8907ccdb4f66983558c85eee8dcb.png?resizew=167)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11c1db76cc7e1894f74a50d71736455.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d411efb0aacd95470c63f3a03a6bd034.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
,点
为
的中点,连接
,以
为直径作
,交
边于点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/ebc2d9d7-5a16-47f5-840d-982a0c001515.png?resizew=156)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/ebc2d9d7-5a16-47f5-840d-982a0c001515.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa80cfd38f59e5cbbb30628d03113689.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb6362bc99fba4bcd7331db9aee922c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次