题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101300-95163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101300-73008.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101300-95413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101300-66688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101301-75463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101301-23072.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101301-16002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101301-56997.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101302-29003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101302-42265.png)
解析
试题分析:(1)可求AB="8" ,根据勾股定理:AC=
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101302-68210.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101303-30430.png)
试题解析:解:(1)在Rt△ABC中,∵
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101303-96616.png)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101300-66688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101301-75463.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101303-13500.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101303-62566.png)
∴在Rt△ABC中,
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101304-52945.png)
(2)在Rt△ABC中,
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101304-24360.png)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101301-75463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101304-98791.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101304-91529.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101255-57426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101255-97389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101255-73455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101255-73455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101256-59433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101256-76361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101240-43870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-30574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-37434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-54441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-88553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-54459.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-11714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-46183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101242-31747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101242-65485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101242-61384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-46183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101242-90078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101243-63717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101243-58036.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101243-63717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101241-11714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101243-96175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101243-84241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101244-64018.png)
A.![]() | B.![]() | C.![]() | D.1 |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101230-70196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101221-86169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104101221-26705.png)
最新试题
- 1I often see an old lady _____ in the sea in the morning.[
- 2某单色光照射到一逸出功为W的光电材料表面,所产生的光电子在垂直于磁感应强度为B的匀强磁场中做圆周运动的最大半径为r,设电
- 3从方框中选择适当的单词,并用其正确形式填空,补全下面的短文enjoy swim come student learn f
- 4阅读材料,回答问题材料一:乌江航道(乌江渡至龚滩)被规划为贵州省出省水运通道,也是交通运输部规划的全国水运主通道。乌江航
- 5计算:(1)a-3ba-b+a+ba-b;(2)2a+ba2-b2+bb2-a2-2b(a+b)(a-b).
- 6有三个运动员,某次比赛每人打破记录的概率都是0.1,这三个运动员同时参加比赛,记录未能打破的概率是( )A.0.001
- 7阅读下面这篇散文,完成小题。走过荒原①诗歌总是使人难忘。我已经很少阅读诗歌了,然而诗歌中的一些意象,比如日本俳句中的菊花
- 8阅读下列材料.结合所学知识回答问题。材料一:“一起来,更精彩!”,这一口号是对所有希望参与亚运、服务亚运的志愿者的号召,
- 9一个人用力提桶时,起主要作用的是[ ]A.上皮组织 B.结缔组织 C.肌肉组织 D.神经组织
- 102012年2月15日,武钢与加拿大ADI资源公司就合作矿石资源项目签约。武钢在全球已掌控矿石资源超过30亿吨。根据武钢目
热门考点
- 1电压是______的原因,提供电压的器件叫______.一节干电池的电压是______V,我国家庭电路的电压是_____
- 2身高1.6m的小黎站在穿衣镜前,他在镜中像高______m,当他走近穿衣镜时,他的像的大小______.(填“变大”“不
- 3一轮船从A点沿北偏东70°的方向行10海里至海岛B,又从B沿北偏东10°的方向行10海里至海岛C,若此轮船从A点直接沿直
- 425. The farmers once used wood to build a house ______ to st
- 5下列因式分解变形中,正确的是( )A.ab(a-b)-a(b-a)=-a(b-a)(b+1)B.6(m+n)2-2(m
- 6“中国梦”关乎每个人的幸福生活.为进一步感知我们身边的幸福,展现成都人追梦的风采,我市某校开展了以“梦想中国,逐梦成都”
- 7公元前8世纪以后,随着雅典社会经济的发展,雅典的商业贸易日趋繁荣。下列有关叙述,正确的是 ①雅典人主要在地中海、大西洋沿
- 8用于制作玻璃钢安全帽的玻璃钢属于( )A.金属材料B.无机非金属材料C.合成材料D.复合材料
- 9甲、乙两弹簧振子,振动图象如图所示,则可知( )A.两弹簧振子完全相同B.两弹簧振子所受回复力最大值之比F甲:F乙=2
- 10He ____ from Canada.[ ]A. comeB. isC. areD. be