Problem Solving
试题详情
题目：
The points R , T , and U lie on a circle that has radius 4. If the length of arc RTU is 
, what is the length of line segment RU ?
, what is the length of line segment RU ?选项:
A、
B、
C、3
D、4
E、6
答案:
D
, what is the length of line segment RU ?
