??????:

�

�1 ?"? ??? ???

� ?"? ????? ????, ?????? ??????? ??????? ???? (?? ???? ????)

1 ?? ?????? ?????

1 ?? ???? ??? ???

4 ???? ???, ??????

??? ???

???, ???? ????, ??? ?????

???? ?????:

�

1. ?????? ?? ???? ?????? ???? ?????? ( 180�)

2. ?????? ????? ???? ?? ?????? ??????? ??? ?? ?????? ????? ?????.� ?????? ???? ??? ????, ???, ??????, ???? ???? ???.

3. ?? ???? ????? ????, ?????? ???? ?? ??? ???? ???? ???? ??????? ???? ?????, ????, ??????, ????.

4. ?????? ?? ???? ?? ??? ?????? ????? ?????. ?????? ???? ???????. (?? ????? ?? ??? ???? ???? ????).

�