Odpowiedzi

2010-01-29T20:41:46+01:00
A=10 cm
b=2 cm
P=2cm*10cm=20cm^2
obw=10cm*2+2cm*2=20cm+4cm=24cm
2010-01-29T20:45:37+01:00
A= 2cm
b= 10 cm

P= a x b
P = 2 x 10
P = 20 cm²

Ob = 2 x a + 2 x b
Ob = 2 x 2 + 2 x 10
Ob = 4 + 20
Ob = 24 cm