Paralelipipedul dreptunghic (aplicații) — Teorie

$A_{l} = P_{b} \cdot h A_{t} = A_{l} + 2 A_{b} V = A_{b} \cdot h d = \sqrt{L^{2} + l^{2} + h^{2}} P_{b} = 2 L + 2 l A_{b} = L \cdot l$

sau:

$A_{l} = h (2 L + 2 l) A_{t} = 2 (L \cdot l + L \cdot h + l \cdot h) V = L \cdot l \cdot h$