Odpowiedzi

2010-03-23T14:01:33+01:00
Dane:
a = 5 cm
b = 6 cm
Pc = 280 cm²

Szukane:
H = ?


Pc = 2ab + 2bH + 2aH
280 = 2×5×6 +2×6×H + 2×5×H
280 = 60 + 12 H + 10 H
22H = 280 - 60
22H = 220
H= 10

2010-03-23T14:02:39+01:00
Pc=2*Pp+2*6*h+2*5*h
280=2*5*6+12h+10h
280=60+22h
280-60=22h
220=22h /:22
h=10
2010-03-23T14:10:41+01:00
A = 5 cm
b = 6 cm
Pc = 280 cm²

H = ?

Pc= 2Pp+Pb
Pp= 2ab
Pb=2aH+2bH
Pc = 2ab + 2bH + 2aH
280 = 2×5×6 +2×5×H + 2×6×H
280 = 60 + 10 H + 12 H
22H = 280 - 60
22H = 220/:22
H= 10