How do you convert the cartesian coordinate (18, −6) into polar coordinates? Precalculus Polar Coordinates Converting Coordinates from Rectangular to Polar 1 Answer José Roberto Pereira Oct 18, 2015 18.97 /_-18.43^(o) Explanation: a^2=18^2+6^2 a=sqrt(18^2+6^2) a=sqrt(360)=18.97 theta=tg^-1(-6/18)=-18.43^(o) Answer link Related questions What are the polar coordinates of (0, -2)? What are the polar coordinates of (-4, 0)? What are the polar coordinates of (3, 4)? What are the polar coordinates of (-2,0)? How do I convert Cartesian coordinates to polar coordinates? How do I find the polar form of a+bi? How do I find the polar form of 3sqrt2 - 3sqrt2i? How do you change (4, -1) from rectangular to cylindrical coordinates between [0, 2π)? How do you change (0,3,-3) from rectangular to spherical coordinates? How do you find the rectangular coordinates if you given the cylindrical coordinate (5, pi/6, 5)? See all questions in Converting Coordinates from Rectangular to Polar Impact of this question 1892 views around the world You can reuse this answer Creative Commons License