Question

HELP ME PLEASE!!

Given: AABC is equilateral
Find the length of segment BC.

Answer 1

D

Explanation:

1) if sin(ACB)=BC/BD, then BC=BD*sin(ACB);

2) m(ACB)=60°, then sin(ACB)=√3/2, then

3) BC=5/(√3/2)=10/√3 or 10√3/3.