a]
a = 5 cm
b = 2 cm
h = 3 cm
P = ½ * (5 + 2) * 3 = 7 * 1,5 = 10,5 cm²
b]
a = 7 cm
b = 3 cm
h = 2 cm
P = ½ * (7 + 3) * 2 = 10 * 1 = 10 cm²
