Question

How do you find the length if you already know the perimeter? This is what I mean:

Morgan is ordering carpet for her bedroom. She measures the room and finds a width of 22 feet and a perimeter of 66 feet.

I know for sure that the first thing I need to do is find the length, but how do I do that with only knowing the width and perimeter?

Answer 1

You can find length by knowing the formula for perimeter: 2l+2w= p; where l= length, w= width, and p= perimeter. Substitute the things you know and solve.

In this case, the length would be 11 feet.