Multiple both numbers by 2 since there are 2 of them on a rectangle. After, add them.
30 x 2 = 60
39 x 2 = 78
60 + 78 = 138
And never forget to label your units!
The perimeter of the rectangle is 138 inches.
To get the area, multiply the sides by each other.
30 x 39 = 1170
The area of the rectangle is 1170 inches^2, or 1170 inches squared.
