Răspuns:
a) BD = CD√2 => BD = 4√2 m
CD = BD/2 = 4√2m/2 = 2√2 m
VO = √(VD² - OD²)
= √(41/2 - 8)
= √(41 - 16)/2
= √25/2 = 5/√2 = 5√2/2 m
b) OM = BC/2 = 4m/2 = 2m
VM = √(VO² + OM²)
= √(50/4 + 4)
= √(25/2 + 4)
= √(25 + 8)/2
= √(33/2)
= √33/√2
= (√66)/2 m
