Respuesta :

Answer:

p=(l+b) 2

p=38

l+ b= 38/2=19

if=7.

l=19-7

= 12

Step-by-step explanation:

0090086

Answer:

12cm

Step-by-step explanation:

perimeter is l+l+b+b

b is 7

7+7+l+l

14+l+l=38

-14

l+l=24

2l=24

divide by 2

l=12cm