Given the perimeter of a rectangle and either the length or width, find the unknown measurement using the appropriate formula.

Question

Given the perimeter of a rectangle and either the length or width, find the unknown measurement using the appropriate formula.  

 

THE PERIMETER IS 128 FT AND THE THE WIDTH IS 34 FT. 

 

THE WIDTH OF THE RECTANGLE IS?

Answer 1

Taylor: Let the length be L and width be W. Then the perimeter, let us call it P, is ( the sum of all sides) that is P = 2(L + W). Taylor, you see that there are three variables connected by an equation. If ANY two are you can find the value of the third. In your question, P = 128 and W = 34. The equation becomes 128 = 2(L + 34). Solve for W. 128 / 2 = L + 34. 64 = L + 34 L = 30. Check. P = sum of all sides = 34+30+34+30 = 128. Done! Dr. G.