Side AB of a triangle ABC is 80 cm long, whose perimeter is 170 cm. If angle ABC = 60°, the shortest side of triangle ABC measures _______ cm.

Side AB of a triangle ABC is 80 cm long, whose perimeter is 170 cm. If

1.	Side AB of a triangle ABC is 80 cm long, whose perimeter is 170 cm. If angle ABC = 60°, the shortest side of triangle ABC measures _______ cm.
A.	17
B.	15
C.	25
D.	21
Answer» B. 15