如图,在
中,
,
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1e39bfb2f4be18735fc76997a96582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b528818e98c5c2ddf301048b4228d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/146e6cf8-0af5-457e-b8c2-a3d2d7799cca.png?resizew=127)
更新时间:2024-01-11 10:14:26
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,设∠BAC=θ(0°<θ<90°).现把小棒依次摆放在两射线之间,并使小棒两端分别落在射线AB,AC上.从点
开始,用等长的小棒依次向右摆放,其中
为第一根小棒,且
=
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/93cfde69-135d-4703-bf45-b57127a8a955.png?resizew=266)
(1)小棒能无限摆下去吗?答: .(填“能”或“不能”)
(2)若已经摆放了3根小棒,则
= ,
= ,
= ;(用含
的式子表示)
(3)若只能摆放4根小棒,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8827bb81ddef56b9847bc481c840094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8827bb81ddef56b9847bc481c840094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17230625e72d3a9c6d72ff61019ff61.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/93cfde69-135d-4703-bf45-b57127a8a955.png?resizew=266)
(1)小棒能无限摆下去吗?答: .(填“能”或“不能”)
(2)若已经摆放了3根小棒,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f64fa38725c136504f723019a18dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93fa313adc4ac7608ba9449fd755212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8d4017e1a37acb0c8e00508be472b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(3)若只能摆放4根小棒,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,BD是△ABC的角平分线,DE∥BC,交AB于点E,∠A=50°,∠BDC=75°.求∠BED的度数.
![](https://img.xkw.com/dksih/QBM/2019/11/12/2332218067574784/2332974608973824/STEM/b2c2a34dc13b49c0aebe007cc7f41605.png?resizew=150)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
于点
,在
上取一点
,连接
、
,使得
,过点
作
,且
,连接
.
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698417262592/2585729127391232/STEM/9502d85724024a818d61aca3be8829cb.png?resizew=182)
(1)如图,求证:四边形
是平行四边形;
(2)如图,若
平分
,延长
交
于点
,请直接写出与
相等的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3920155c87affb99bc20f1336dba02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a48110cf3677695f60e95d4b591a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f303f40859534e2a64d8e39d34ebdb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/2710d1ae999c3297ce2b89c93754a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a47dcb24ffe20e8153e0d113ff8bee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698417262592/2585729127391232/STEM/104aa0dc059a47c7b31e9549ca4a7e57.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698417262592/2585729127391232/STEM/9502d85724024a818d61aca3be8829cb.png?resizew=182)
(1)如图,求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)如图,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b400a6c61254b81d4ccc5a2a7cf4c967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,在
中,点D在
上,
,
,
.
(1)作
的垂直平分线
,分别交
、
于E、F (不写作法,保留作图痕迹).
(2)连接
,求
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82bbe1a38d426af545e65b37b6913ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/30/8d9a12a6-ff82-4e83-a8ca-a69724a7b32a.png?resizew=202)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd1bc0388e7fad3e849ca39c67f5034.png)
您最近一年使用:0次