Odpowiedzi

2009-12-01T17:52:19+01:00
A) r=1 r=2
P= πr2 p=πr2
P= 1πcm 2 P = 4πdm 2

l=2πr l= 2x 3,14 x 2
l= 2 x 3,14 x 1 l = 12,56
l= 6,28 cm

b) P= πr2 P= π x (2,4) 2
P= πx (1)2 P= 5,76 π m2
P=1πkm2

l= 2 x 3,14 x1 l= 2 x 3,14 x 2,4
l= 6,28 km l= 15,072 m