Respuesta :
Answer:
288 cm.
Step-by-step explanation:
Area of the rectangle = 64 * 81 = 5184 cm^2 which is also the area of the square.
The side of the square = √5184 = 72 cm.
So the perimeter of the square = 72 * 4
= 288 cm.
The answer is c.288 since 64*81=5184 and the square root of 5184 is 72 and 72*4=288