Respuesta :

Answer:

B. 13.5

Step-by-step explanation:

Add

4.5+4.5= 9

4.5+9=13.5

        =13.5

Answer:

B. 13.5

Step-by-step explanation:

Perimeter is each side added up. Each side is the same. 4.5+4.5+4.5 = 13.5