oblicz objętość i pole prostopadłościanu o wymiarach 5 13 9



Odpowiedź :

[tex]a = 5\\b = 13\\h = 9\\\\V = P_{p}\cdot h\\\\V = a\times b\times h\\\\V = 5\times13\times9\\\\\boxed{V = 585 \ \ [j^{3}] }[/tex]

[tex]P_{c} = 2P_{p} + P_{b}\\\\P_{p} = 5\times 13 = 65 \\\\P_{b} = 2ah+2bh} = 2\times5\times9 + 2\times13\times 9=90+234\\\\P_{b} = 324\\\\P_{c} = 2\times65+324 = 130+324\\\\\boxed{P_{c} = 454 \ \ [j^{2}]}[/tex]

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