UC知道SAT的一些题目，英语数学好的进
来源：百度知道 编辑：UC知道 时间：2024/06/24 00:59:46
1\given two similar triangles one of which has twice the perimeter of the other,by what factor is the area of the larger triangle bigger than the smalier?
2\to get a cabie from the computer to the internet hub,Adam lays the cabie carefully along theedge of the carpet by the wall. Assuming the room is rectangular,if he needed 3 feet of cabie to get from the hub to the floor,12feet of cable to run along the north wall,14 feet along the east wall,7 feet along the south wall,and 5 feet up to the desk top camputer,approximately what is the straight line distance from the hub to the computer?
3\ Three circles each with radius r intersect each other such that each passes through the center of the other two circles. find the area of the intersection of their interiors.
4\If the diameter of a cylindrical can is increased by 20%,by approximately what percentage should the heighe be increased in order to double the volume of the can?
a:80.0%
2\to get a cabie from the computer to the internet hub,Adam lays the cabie carefully along theedge of the carpet by the wall. Assuming the room is rectangular,if he needed 3 feet of cabie to get from the hub to the floor,12feet of cable to run along the north wall,14 feet along the east wall,7 feet along the south wall,and 5 feet up to the desk top camputer,approximately what is the straight line distance from the hub to the computer?
3\ Three circles each with radius r intersect each other such that each passes through the center of the other two circles. find the area of the intersection of their interiors.
4\If the diameter of a cylindrical can is increased by 20%,by approximately what percentage should the heighe be increased in order to double the volume of the can?
a:80.0%
1 大的三角形的三边之和要是小三角形三边之和的2倍。不过这2个三角形是相似的，所以只要要求大三角形的边=2倍小三角形的边，他们的边是成固定比例的，明白了么？
2 我不是学计算机的，而且你有单词书写错误，比如说cable不是cabie。。。
不过偶还是做出来了，根号下[（5平方+14平方）+8平方]=16.88（约等于的）
3 没说要算面积，但是已经给了你半径r...，如果只是要找出公共面积，我想可以这样描述：奥运5环旗取左边上面2个和左边下面一个，然后把它们3个圆靠得更紧些，使任意一个都通过另外2个的圆心，那么公共面积你一定能看出来了：）如果要算面积你再找我！
4 [（1+0.2）/2]开平方*兀*hx=（1/2）开平方*兀*2*h
即0.36hx=0.5h 则x=1.38 即要增大约38.88%左右
5 要用长方形的A边和对角线d表达周长。取A和d的夹角为t，则B边长度=根号下（d平方-A平方）=d*cost，然后2*（A+B）=周长了
但是rectangle也是矩形的意思，如果A边和B边不是垂直的则要复杂些。这样的考试你可以你用考虑长方形的情况了。一定得按矩形做的话你就留言给我，下次我带笔来网吧。。。
第二题如果要算面积的话我已经做出来了，s=[兀r平方/6 - （根号3）/4]*3 + （根号3）/4
我卡里没钱了，要回家了，以后再说！
the above one is good