名校
解题方法
1 . 如图,在四边形
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694532952064000/2694586105929728/STEM/e8ac7d6ba5664fea8200e18539ac4212.png?resizew=177)
(1)求
;
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04be58ea6ca37a850422631eb3e994d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18834f4ba51bf4d490f35ed02379fec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b326dc38d92806c8911b9f9e1a3f323e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdb666321e6637175260c1fbc9f1f92.png)
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694532952064000/2694586105929728/STEM/e8ac7d6ba5664fea8200e18539ac4212.png?resizew=177)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b49530dac385216300ab53ebf82450.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2021-04-07更新
|
4563次组卷
|
19卷引用:北京市西城区2023届高三一模数学试题查漏补缺练习(2)
北京市西城区2023届高三一模数学试题查漏补缺练习(2)北京市海淀区2021届高三下学期期中数学试题北京市海淀区2021届高三一模数学试题福建省福州第一中学2020-2021学年高一下学期期中考试数学试题重庆市第八中学2021届高三下学期高考适应性考试(三)数学试题广东省实验中学2020-2021学年高二下学期期中数学试题(已下线)专题2.1 解三角形-常规型-2021年高考数学解答题挑战满分专项训练(新高考地区专用)宁夏青铜峡市高级中学2022届高三上学期期中考试数学(理)试题湖北省十一校2022届高三下学期第二次联考数学试题内蒙古霍林郭勒市第一中学2021-2022学年高一下学期第一次月考数学(文)试题广东省汕头市金山中学2021-2022学年高二下学期期中数学试题福建省福州第一中学2022届高三上学期开学质检考试数学试题福建省永安第九中学2023届高三上学期期中考试数学试题北京市首都师范大学附属中学2023届高三上学期12月月考数学试题北京市汇文中学2023届高三校模数学试题浙江名校联盟2022-2023学年高二下学期期中联考数学试题(B卷)北京汇文中学2023届高三下学期3月月考数学试卷云南省昆明市云南师范大学实验中学2023-2024学年高二上学期9月月考数学试题北京市顺义区杨镇第一中学2024届高三10月月考数学试题
名校
2 . 如图,在
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/2/18/2401669017673728/2401756928524289/STEM/45f045bdf7234d2ca7d5f546a51b4177.png?resizew=229)
(Ⅰ)求AB;
(Ⅱ)求AD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52884209c1cce0b20a26d1a5e6024a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba03505a2ec6653c4a65830d61694c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35333abd7f02d663d15251bc5cbbf921.png)
![](https://img.xkw.com/dksih/QBM/2020/2/18/2401669017673728/2401756928524289/STEM/45f045bdf7234d2ca7d5f546a51b4177.png?resizew=229)
(Ⅰ)求AB;
(Ⅱ)求AD.
您最近一年使用:0次
2020-02-18更新
|
301次组卷
|
2卷引用:北师大附中2017-2018学年高一下学期期末数学试题1
名校
3 . 如图,在
中,
为钝角,
,
,
为
延长线上一点,且
.
![](https://img.xkw.com/dksih/QBM/2018/7/23/1994896519200768/1999840857276416/STEM/f59c08de-630f-42cc-8f87-39a306ae9d93.png?resizew=278)
(1)求
的大小;
(2)求
的长及
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02556f3e48bd835d4a0f44dbe0440296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e1bd4f72b3edd9647378d1191857fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337a153faaa5ee9396c0abc70aea121d.png)
![](https://img.xkw.com/dksih/QBM/2018/7/23/1994896519200768/1999840857276416/STEM/f59c08de-630f-42cc-8f87-39a306ae9d93.png?resizew=278)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
2018-07-30更新
|
482次组卷
|
2卷引用:北京市第三中学2021届高三上学期期中考试数学试题
4 . 如图所示,在山顶
点已测得
,
,
的俯角分别为
,
,
,其中
,
,
为山脚两侧共线的三点,现欲沿直线
开通穿山隧道,为了求出隧道
的长,至少还需要直接测量出
,
,
中的哪些线段长?把你上一问指出的需要测量得线段长和已测得的角度作为已知量,写出计算隧道
的步骤.
![](https://img.xkw.com/dksih/QBM/2018/3/14/1901794656919552/1906225170636800/STEM/74f2b76b703b488ab486b9d8e543099f.png?resizew=304)
解:
步骤
:还需要直接测量得线段为.
步骤
:计算线段.
计算步骤:
步骤
:计算线段
计算步骤:
步骤
:计算线段
计算步骤:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2018/3/14/1901794656919552/1906225170636800/STEM/74f2b76b703b488ab486b9d8e543099f.png?resizew=304)
解:
步骤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
步骤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
计算步骤:
步骤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
计算步骤:
步骤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
计算步骤:
您最近一年使用:0次