???? ????? ? ???? ???? ? ????? ?????? ???? ? ????????? ??????? ? ???? ??? ??????? ??????? ?????? ? ??? ???? ?????? ????? ? ???? ????? ? ????? ????? ???? ?????????? ????? ??????? ?????????? ????? ????????????? ???? ?? ???????In geometry, a ray is the fact that Portion of a straight line that extends in one directiononly. The expression "ray" is used