oblicz pole prostokata o wymiarach:a.4cm i 15mm b.2cm i 19mm c.3cm i 80mm

4*1,5=6 cm^2 2*1,9=3,8 cm^2 3*8=24 cm^2

a. 15 mm = 1.5cm 4 * 1.5 = 6 cm^2 b. 19mm = 1.9 cm 2 * 1.9 = 3.8 cm^2 c. 80 mm = 8 cm 3 * 8 = 24 cm^2