Triangle ABC is similar to triangle XYZ. The lengths of the two sides of each triangle are given in the figure. Find the length of side a

Answer:
a = 8
Step-by-step explanation:
AB / XY = CB / ZY
17 / 25.5 = a / 12
cross-multiply:
25.5a = 17(12)
25.5a = 204
a = 8