Spherical coordinates locate a point in space by indicating a distance, [math]\rho[/math], and two angles, [math]\phi[/math] and [math]\theta[/math]. [br][list][*][math]\rho[/math] is the point's distance from the origin, and is never negative. [/*][*][math]\phi[/math] is the angle that ray from the origin through the point makes with the positive [math]z[/math][math]z[/math]-axis.[/*][*][math]\theta[/math] is the angle from cylindrical coordinates.[/*][/list]Certain solids can be described by providing ranges for these three coordinates. Play with the interactive figure here to get a feel for the types of solids that can be created with spherical coordinates.[br]