Respuesta :
Step-by-step explanation:
Just do this
2(L+B)
2(18+24)
2×42
84 Ans.
perimeter is the sum of every side of the shape. in this case you have two sides that are 18 and two that are 24 (since a rectangle has two congruent sides). so when you add 18+18+24+24 together you get 84 which is your answer