r -e rad

r -e ″ | r -e arcmin | r -e ' | r -e mil | r -e mrad | r -e g | r -e grad | r -e ° | r -e point | r -e sign | r -e rad | r -e Sextant | r -e Quadrant | r -e Rt Angle | r -e quartercircle | r -e semicircle | r -e cyc | r -e circle | r -e turn