Odpowiedź :
P = 1/2 * a * h
a) P = 1/2 * 5 * 3 = 7,5 cm²
b) 1,2 dm = 12 cm
30 mm = 3 cm
P = 1/2 * 12 * 3 = 18 cm²
c) 5cm * 3 = 15 cm
P = 1/2 * 5 * 15 = 37,5 cm²
P = 1/2 * a * h
a) P = 1/2 * 5 * 3 = 7,5 cm²
b) 1,2 dm = 12 cm
30 mm = 3 cm
P = 1/2 * 12 * 3 = 18 cm²
c) 5cm * 3 = 15 cm
P = 1/2 * 5 * 15 = 37,5 cm²