Question 120221
The distance between two adjacent vertices of a square gives the length of a side, s.  The perimeter is then given by 4s.


To find the distance between two points <b><big>({{{x[1]}}},{{{y[1]}}})</b></big> and <b><big>({{{x[2]}}},{{{y[2]}}})</b></big>, use the distance formula:


{{{s=d=sqrt((x[1]-x[2])^2+(y[1]-y[2])^2)}}}


{{{s=sqrt((6-(-3))^2+(7-4)^2)}}}


{{{s=sqrt(9^2+3^2)}}}


{{{s=sqrt(81+9)=sqrt(100)=10}}}


The perimeter is then {{{4*10=40}}}, however, you were instructed to express your answer to the nearest tenth, therefore you should write 40.0 as your answer.


Hope this helps,
John