Odpowiedź :
a) P = 7cm x 7cm x 7cm = 343cm2
b) P = 6dm x 8dm + 6dm x 2dm + 8dm x 2dm = 48dm + 12dm + 16dm = 76dm2
b) P = 6dm x 8dm + 6dm x 2dm + 8dm x 2dm = 48dm + 12dm + 16dm = 76dm2
Pole sześcianu
P = 6a^2
P = 6 * (7cm)^2 = 6 * 49cm^2 = 294cm^2
Pole prostopadłościanu
P = 2 ( ab + ac + bc )
P = 2 ( 6dm* 8dm + 6dm * 2dm + 8dm * 2dm) = 2 (48 dm^2 + 12 dm^2 + 16dm^2) = 2 * 76dm^2 = 152 dm^2