Can a triangle have sides with the given lengths 1ft, 5ft, 11ft

Let a, b and c is side of a triangle where:

a = 1

b = 5

c = 11

a^2 + b^2 = c^2. if the following statement is right, then triangle have these side.

1^2 + 5^2 = 11^2

1 + 25 = 121

26! = 121 (! = means not equal to)

Therefore, triangle can't have side length of 1, 5 and 11 ft.