perimeter of a parallelogram?

Question

one side of a parallelogram is 4.8 cm and the other side is3/2 times the first side, find the perimeter of parallelogram?

Answer 1

let's call side the first side a and the second side b

if a = 4.8cm

b = 4.8(3/2) or 4.8 x 1.5 which equals 7.2

if b = 7.2 and a = 4.8 to get the permiter we need to add all 4 sides together as in a + b + a + b

4.8 + 4.8 + 7.2 + 7.2 = 24

Perimeter = 24

Answer 2

Formula?  Pleeeeeeaaaase thats all I need!