[Pharo-users] inserting special character 'vector angle' symbol

I need to display electrical phasors (which are complex numbers in polar notation). This requires a special 'vector angle' symbol as shown http://www.allaboutcircuits.com/vol_2/chpt_2/5.html. What are my options for displaying such a symbol? ∠ My searching only turned up 'Character characterTable' I wondered if I can replace one of those bitmap characters with my own. I also found an online character set converter http://kanjidict.stc.cx/recode.php which converted from the character from ISO-8859-1 to UTF-8 "∠" but that result doesn't mean a lot to me. Hints would be greatly appreciated. cheers -ben