1) The area is given by:
[tex]\pi(12)^2=452.3893sq\text{ in}\approx452.4sq\text{ in}[/tex]
2) The area is:
[tex]\pi\times12^2=452.3893sqkm\approx452.4sqkm[/tex]
3)The area is given by:
[tex]\pi\times9^2=254.4690049\approx254.5sqm[/tex]
4)The area is given by:
[tex]\pi(11)^2=121\pi=380.1327sqcm=380.1\text{sqcm}[/tex]
