There are two formulas to convert polar coordinates to rectangular coordinates. The cosine of the angle times the radius determines the rectangular x-coordinate, and the sine of the angle times the radius determines the rectangular y-coordinate.
While the x and y values of rectangular coordinates are based on the distance of the point from each axis, the first value of polar coordinates is based on the radius of a circle between said point and the point (0, 0). The second value is based on the degrees of the angle measured counter-clockwise from x-axis in the first quadrant.
Rectangular coordinates are also known as Cartesian coordinates.