(4,-1) turns into (1,4) because the equation for that is (x,y)->(y•-1,x)
Rotations move lines to lines, rays to rays, segments<span> to</span>segments<span>, </span>angles<span> to </span>angles, and parallel lines to parallel lines, similar to translations and reflections. Rotations preservelengths<span> of </span>segments<span> and degrees of measures of </span>angles<span>similar to translations and reflections.</span>
According to my examination I have confirmed that I do NOT repeat do NOT know this.