Question 1131216

given: {{{r=-3}}}

the relationships between rectangular and polar coordinates are:


{{{r=sqrt(x^2+y^2)}}}

{{{-3=sqrt(x^2+y^2)}}}..........square both sides

{{{(-3)^2=x^2+y^2}}}

{{{x^2+y^2=9}}} ->which is a circle centered in the origin and with radius of  {{{sqrt(9)=3}}}