Hello there,
the answer you are looking for will be
a) it has reflectional symmetry with 16 lines of symmetry
The given polygon has a perimeter of 3 + 5 + 4 + 6 = 18
A similar polygon has sides that are 3 times as big ot 9 + 15 + 12 + 18 = 54
The ratio is 18/54 or 1/3
See Below (Process and answer)