题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050335-64628.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050335-21669.png)
解析
解答:解:连接DE,AE,
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050335-24556.png)
∵AB=AC=3cm,AC为直径,
∴∠B=∠C,AE⊥BC,
∴∠BAE=∠CAE,BE=EC=1cm,
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050335-71832.png)
∴DE=EC,
∴BE=DE,
∵∠B=∠C,
∴∠B=∠EDB,∠C=∠B,
∴△ABC∽△EBD,
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050336-92577.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050336-56106.png)
∵EC=1cm,AC=3cm,
∴AE=
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050336-22649.png)
∴S△ABC=
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-84735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-84735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-80525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-80525.png)
∴阴影部分面积=S△EBD=
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-74256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-80525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-92479.png)
故答案为:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050337-92479.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050328-88411.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050320-86822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050320-86822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050320-68635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050320-58197.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050320-58197.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050320-79294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050320-86822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050321-87556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050321-87556.png)
A.![]() ![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050322-32733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050313-14260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050313-13013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050313-13013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050313-65987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050314-86207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050313-13013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050314-26027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050314-36480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050314-36288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050315-35256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050306-46896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050306-19597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050306-77218.jpg)
①点
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050306-15007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050307-66897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050307-96269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050307-21153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050308-25442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050307-21153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050308-62672.png)
②点
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050306-15007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050307-66897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050308-60656.png)
③点
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050306-15007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050308-62351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050307-21153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050309-98158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050308-25442.png)
④点
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050306-15007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050307-66897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105050309-38160.png)
以上命题正确的是 .
最新试题
- 1已知函数f(x)=ex•g(x),其中g(x)=ax2-2x-2.(1)若存在x∈R,使得g(x)>0成立,求实数a的取
- 2近年来,江苏省通过不断探索实践,为农民工同享市民待遇拆藩篱,为农民工加速融入城市撑起了强有力的制度“保护伞”。江苏这样做
- 3【题文】已知集合,.则 。
- 4小明的月考、期中考试和期末考试成绩分别是90分、86分和88分,学期总评成绩是由这3项成绩分别按30%、30%和40%的
- 5珠穆朗玛峰常年冰雪覆盖,形成其气候严寒的主要因素是[ ]A.纬度位置 B.人类活动 C.海陆位置 D.地形
- 6把原文中画线的句子翻译成现代汉语。(10分)(1)其见遗于一时,必有收而宝之于后世者。
- 7读沪宁杭地区略图,完成下列要求:(1)图中字母代表南京市的是______.(2)图中有我国五大淡水湖之一的______湖
- 810岁的成都小女孩姚启风热爱芭蕾舞,因家境贫寒,每晚只能在昏黄的路灯下,在父亲捡来的一张毯子上默默地苦练起芭蕾舞基本功,
- 9解方程:
- 10已知抛物线C:,将抛物线C平移得到抛物线C,若两条抛物线C、C关于直线x=1对称,则下列平移方法中,正确的是( )
热门考点
- 1下列说法正确的是[ ]A.在分子中,两个成键的原子间的距离叫做键长 B.H-Cl的键能为431.8kJ/mol,
- 2以下人物中,被誉为“南美的解放者”的是[ ]A.玻利瓦尔B.圣马丁C.伊达尔哥D.苏克雷
- 3 现有分子式均为C3H6O2的四种有机物A、B、C、D,把它们分别进行下列实验加以鉴别,其实验记录如下:(已知同一碳原子
- 4一个几何体的三视图如下图所示,则这个几何体的名称是______.并根据三视图画出它的平面展开图,并求其表面积S.
- 5已进入汛期,7年级1班的同学到水库调查了解汛情.水库一共有10个泄洪闸,现在水库水位已超过安全线,上游的河水仍以一个不变
- 6将0.345保留两个有效数字的近似数是_______;
- 7The TV play _____ for ten minutes when I turned on the TV.
- 8已知, ,求。
- 9下列各句书写完全正确的一项是( )A.在欧洲市场上,浙江人开设的面积在1000至2000平方米的百货与杂货超市发展迅
- 10 ––Can you ride a bike? ––No, I ____.A.may notB.mustn’tC.nee