Triangle 1: a(6,6), b(12,9), c(9,6)
triangle 2: a′(2,2), b′(4,3), c′(3,2)

how are the lengths of the sides of the two triangles related?

a. triangle 2 has sides that are three times longer than triangle 1.
b. there is no relationship.
c. triangle 2 has sides that are one-third as long as triangle 1.
d. triangle 2 has sides that are half as long as triangle 1.