Factor 26r the power of 3 S + 52 r ^ 5 - 39 r ^ 2 s ^ 4 what is the resulting expression

The answer is part a: use

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's