Polar Coordinates are basically the position of a point in a plane, the first being the length of a straight line represented by "r" which is connects the point to the origin, and the second angle "theta" (represented as @ in this blog post due to the fact I do not have a theta sign) is made by this line with a fixed line. There are four ways to get to the same point on a polar coordinate: (r,@), (-r,@+pi), (r,-2pi-@), (-r, -@-pi). In order to convert between rectangular (x,y) and polar (r,@), remember that the two are equal to each other therefore can be used in stead for each other. Remember these two key equations!
r= /x^2+y^2 (the square root of x squared plus y squared
and
@=tan^-1(y/x) (the inverse tan of y divided by x.
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