Odpowiedzi

2009-11-13T15:26:09+01:00
A)
P = π*r^2*α/360
P = π*2*30/360
P = π*1/6
P= π/6

b)
P = π*r^2*α/360
P = π*9*45/360
P = π*9/8
P = 9π/8