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: