Solve for x. The polygons are similar.

Answer:
Step-by-step explanation:
x = 9
the smaller one has a length of 4 and the bigger one has a length of 12, which is 3 times more, if you look at 8 it would also be 3 times bigger, which is 24.
x + 13 = 24
x = 24 - 13
x = 9