Respuesta :

Answer:

perimeter = 36cm

area. = 45cm^2

Step-by-step explanation:

[tex]perimeter = 3 \times 12 = 36cm[/tex]

[tex]area = 3 \times 3 = 9cm ^{2} \\ \: \: \: \: \: \: \: \: = 9 \times 5 = 45 {cm}^{2} [/tex]