dkMathSymbols.item["9"] := "{u+221f}" ; (∟) right angle
dkMathSymbols.item["("] := "{u+221f}" ; (∟) right angle
dkMathSymbols.item["0"] := "{u+2221}" ; (∡) measured angle
dkMathSymbols.item["9"] := "{u+221f}" ; (∟) right angle
dkMathSymbols.item["("] := "{u+221f}" ; (∟) right angle
dkMathSymbols.item["0"] := "{u+2221}" ; (∡) measured angle