Hej!
Wzór na pole prostopadłościanu :
P = 2(ab + bc + ac)
a)
a = 4 cm
b = 6 cm
c = 3 cm
P = 2(4 cm * 6 cm + 6 cm * 3 cm + 4 cm * 3 cm)
P = 2(24 cm² + 18 cm² + 12 cm²)
P = 2 * 54 cm²
P = 108 cm²
b)
a = 7 m
b = 2 m
c = 3 m
P = 2(7 m * 2 m + 2 m * 3 m + 7 m * 3 m)
P = 2(14 m² + 6 m² + 21 m²)
P = 2 * 41 m²
P = 82 m²
Pozdrawiam! - Julka
