Question

Aria totala a unui paralelipiped dreptunghic cu diminsiunile de 4 cm,3 cm si 6 cm este egala cu ... cm la a doua

Answer 1

$L = 4 \: cm$

$l = 3 \: cm$

$h = 6 \: cm$

$At = Al + 2Ab$

$Al = 2(Lh + lh)$

$Al = 2(4 \times 6 + 3 \times 6)$

$Al = 2(24 + 18)$

$Al = 2 \times 42$

$Al = 84 \: {cm}^{2}$

$Ab = L \times l$

$Ab = 4 \times 3$

$Ab = 12 \: {cm}^{2}$

$At = Al + 2Ab$

$At = 84 + 2 \times 12$

$At = 84 + 24$

$At = 108 \: {cm}^{2}$