Odpowiedź:
P = [(a + b) • h] : 2
a, b = podstawa
h = wysokość
Trapez nr 1
a = 7 cm + 2 cm + 1 cm = 10 cm
b = 7 cm
h = 3 cm
P = [(10 + 7) • 3] : 2 = (17 • 3) : 2 = 51 : 2 = 25,5 cm²
Trapez nr 2
a = 4 cm + 2 cm = 6 cm
b = 4 cm
h = 4 cm
P = [(6 + 4) • 4] : 2 = (10 • 4) : 2 = 40 : 2 = 20 cm²
Trapez nr 3
a = 7 cm
b = 4 cm
h = 6 cm
P = [(7 + 4) • 6] : 2 = (11 • 6) : 2 = 66 : 2 = 33 cm²
