问题
单项选择题
If triangle AOB is equilateral, O is the center of the semicircle ABC, and the radius of semicircle ABC is 6, what is the length to BC ？（）
A.A
B.B
C.C
D.D
E.E
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
If triangle AOB is equilateral, O is the center of the semicircle ABC, and the radius of semicircle ABC is 6, what is the length to BC ？（）
A.A
B.B
C.C
D.D
E.E
参考答案：B