(8分)如右图,△ABC中,AB=AC,绕某点在△ABC所在平面内旋转△ABC,

(8分)如右图,△ABC中,AB=AC,绕某点在△ABC所在平面内旋转△ABC,旋转所得图形与原图形一起恰好成一菱形。画出旋转得到的图形,指出旋转中心、旋转角。(不写作法)

 

答案

旋转中心是BC的中点;旋转角为180

解析:略

 

相关题目

 Every evening after dinner, if not ______ from work, I will spend some time w
 Every evening after dinner, if not ______ from work, I will spend some time walking my dog. A. being tired       B. tiring                 C. tired              
用如图所示的实验装置验证机械能守恒定律。实验所用的电
用如图所示的实验装置验证机械能守恒定律。实验所用的电源为学生电源,输出电压为6V的交流电和直流电两种。质量为0.300kg的重锤从高处由静止开始
除去FeCl3溶液中的Fe(OH)3胶体,可行的方法是(    ) A.过滤
除去FeCl3溶液中的Fe(OH)3胶体,可行的方法是(    ) A.过滤             B.蒸发     C.加入适量的盐酸   D.加入适量的NaOH溶液
根据下面情境,按要求完成题目。 王红早上准备去上学,不
根据下面情境,按要求完成题目。 王红早上准备去上学,不巧妈妈病情加重,而父亲又不在家,王红必须护送妈妈去医院并照顾她,于是她拿起电话,
Do you want to know something about children in African? What do they do for fun
Do you want to know something about children in African? What do they do for fun every day? Find out here: Education School is expensive for many African children.Lots of families can't afford sch
 设函数 f (x)=(x + a)n, 其中, 则 f (x)的展开式中的x4系数为__
 设函数 f (x)=(x + a)n, 其中, 则 f (x)的展开式中的x4系数为_______.
Our son doesn’t know what to _____ at the university; he can’t make up his m
Our son doesn’t know what to _____ at the university; he can’t make up his mind about his future. A. take in        B. take up        C. take over       D. take after  

最新题目