## Geometry: Common Core (15th Edition)

a) $144\ in^2$; $1\ ft^2$ b) 144
Use the formula for the area of a square. $A=s^2=(12\ in)^2=144\ in^2$ $A=s^2=(1\ ft)^2=1\ ft^2$ Since $12\ in=1\ ft$, $144\ in^2=1\ ft^2$.