To determine the amount of binding Erin needs to cover the outside edges of the kite, we need to add up the lengths of all the sides of the kite.
Looking at the pattern, we can see that there are two sides with a length of 13 inches each, and two sides with a length of 15 inches each.
Therefore, the total length of the binding needed is:
13 inches + 13 inches + 15 inches + 15 inches = 56 inches.
Based on this calculation, Erin needs approximately 56 inches of binding to cover the outside edges of the kite.
Among the options given, the closest measurement to 56 inches is 52 inches.
