Question 869228
{{{x}}}= length of the side, in feet
{{{area=x*x=x^2=324}}}
{{{x=sqrt(324)=18}}}
So the side measures {{{highlight(18feet)}}}
How do you find the square root?
There are many ways.
1)You can use a calculator that has a square root key.
2)You can try different numbers:
{{{20*20=20^2=400}}} and {{{324}}} is less that that, so you know that {{{x}}} is less than {{{20}}} .
{{{15*15=225}}} and {{{324}}} is more that that, so you know that {{{x}}} is more than {{{15}}} .
{{{17*17=289}}} and {{{324}}} is more that that, so you know that {{{x}}} is more than {{{15}}} .
If you then calculate {{{18*18}}} you realize that {{{18*18=18^2=324}}} so {{{18}}} is the answer.
3)you could factor {{{324}}}
{{{324=2*162}}} and {{{162=2*81}} so {{{324=2*2*81}}}
Since you know that {{{81=9*9}}} {{{324=2*2*9*9=(2*9)*(2*9)=18*18=18^2}}}