## Geometry: Common Core (15th Edition)

69.3 $ft^{2}$
Create a proportion by using the ratios of the areas. In problem 2, you found the ratio of the areas to be equal to 16:9. $\frac{16}{9}$=$\frac{A}{39}$ Cross multiply. 9A=16(39) 9A=624 Divide both sides by 9 A=69.4