Wzór na pole :
P = 2(ab + bc + ac)
a)
a = 2 cm
b = 2 cm
c = 3 cm
P = 2 * (2 * 2 + 2 * 3 + 2 * 3)
P = 2 * (4 + 6 + 6)
P = 2 * 16
P = 32 cm²
b)
a = 2 dm
b = 5 dm
c = 5 dm
P = 2 * (2 * 5 + 5 * 5 + 2 * 5)
P = 2 * (10 + 25 + 10)
P = 2 * 45
P = 90 dm²
c)
a = 4 m
b = 4 m
c = 5 m
P = 2 * (4 * 4 + 4 * 5 + 4 * 5)
P = 2 * (16 + 20 + 20)
P = 2 * 56
P = 112 m²
