The perimeter of a rectangle equals the sum of its lengths of its 4 sides. If the width of a rectangle is 4 inches and its perimeter is 38 inches, find the length of the rectangle.

Answer 1

P = Perimeter

L = Legth

W = Width

P = 2 L + 2 W = 2 ( L + W )

38 = 2 ( L + 4 ) Divide both sides by 2

19 = L + 4 Subtract 4 to both sides

19 - 4 = L + 4 - 4

15 = L

L = 15 in