Hint
What is the ratio, r when
considering a rectangle with width 4 and length 5? What about a
rectangle with width 8 and length 10? What about any multiple of such
sides? After exploring these ratios we can conclude that:
All 4x5 (8x10) rectangles have r = 16. 2
Prove that this is true by calculating the ratio, p^2/a
Use:
 Perimeter = 2L+2W (L=5, W=4)
 Area = L*W
 Ratio = (2L+2W)^2/L*W
Use this calculator:
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