求解求解啊！！！

faytastic · 发表于 2011-3-2 18:01:33

The points R, T, and U lie on a circle that has radius 4. If the length of arc RTU is 4/3派（就是圆周率那个） , what is the length of line segment RU?

A.
B.
C.   3
D.   4
E.   6

sdcar2010 · 发表于 2011-3-2 21:35:24

Since the length of arc RTU is 4/3派（就是圆周率那个), then the angle RTU = (180)*(4/3) / 4 = 60 degree.

So RU = radius = 4

DDDDDDDDDDD

求解求解啊！！！

所属分类: GMAT考试

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