Question 478881
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/d/da/PerimeterRectangle.svg/200px-PerimeterRectangle.svg.png">
the length of a rectangle is l and the width is w:  P = 2*l + 2*w
if the width is increased by 2 units:  P = 2*l + 2(w+2) = 2*l + 2*w + 4
  perimeter is increased by 4units