The smallest side of the first polygon is 3 units. The shortest side of the second polygon is 9 units.
9 is a factor of 3. So the ratio between the smallest sides of each polygon is:
1 : 3
If the smallest side of each polygon have a ratio of 1 : 3, then the other sides will have a ratio of 1 : 3 (considering that the polygons are 'similar').
Therefore, their perimeters will have the same ratio. Thus the ratio of the two polygons' perimeter is:
1 : 3
