The length of a rectangle is three times its width. If the perimeter of the rectangle is 48 in, find its length and width.

Answer 1

Hi Jenna,

you just need to use the perimeter formula for a rectangle p=2L + 2W

draw a box with labels for length and width and the perimeter.

width = x

length =3x

p=48

solve for x

x=6

plug back into the L= and W= to solve for length and width

Hope that helps!

Answer 2

L=3W

2L+2W=48

2(3W)+2W=48

6W+2W=48

8W=48

W=6

L=3(6)

L=18