Oblicz pole powierzchni calkowitej prostopadlościanu o wymiarach: a)8cm x 5cm X 12cm b) 3 pierwiastki 2 x 4 pierwiastki z 2 x 5 pierwiastkow z 2
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a)
P=2ab+2bH+2aH
P=2×8×5+2×5×12+2×8×12
P=80+120+192
P=392cm²
b)
P=2ab+2bH+2aH
P=2×3√2×4√2+2×4√2×5√2+2×3√2×5√2
P=48+80+60
P=188