Odpowiedzi

2010-04-14T16:54:11+02:00
P = a²
400 = a²
a = √400 = 20

Ob= 4*20 = 80
2 3 2
2010-04-14T16:55:25+02:00
400m2= x2
400m2= x*x
x=20
x*4 -obw
20*4=80m
3 3 3
2010-04-14T16:56:10+02:00
^2 - do kwadratu
P=a^2
400=a^2
a=20m

L=4a
L=4*20
L=80m
1 5 1