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