SAT I 一日一问:2013年11月27日
作者:沪江英语
来源:CollegeBoard
2013-11-28 08:02
Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
In the figure above, O is the center of the circle and is equilateral. If the sides of are of length 6, what is the length of ?
(A)
(B)
(C)
(D) 9
(E) 12