Question

NA TERAZ!
Oblicz pole powierzchni calkowitej ostroslupa
a)ostroslup prawidlowy czworokatny o wszystkich krawedziach rownych 6 cm
b)czworoscian foremny o krawedzi 8 cm
daje naj!

Answer 1

Verified answer

a)

Pc = Pp + Pb

[tex]Pp = 6^{2} =36 cm^{2}[/tex]

[tex]Pb = 4*\frac{6^{2} \sqrt{3} }{4} =4* \frac{36\sqrt{3} }{4} =36\sqrt{3} cm^{2}[/tex]

[tex]Pc= (36+36\sqrt{3} ) cm^{2} =[36(1+\sqrt{3} )]cm^{2}[/tex]

b) [tex]Pc = 4*\frac{8^{2} \sqrt{3} }{4} =4* \frac{64\sqrt{3} }{4} =64\sqrt{3} cm^{2}[/tex]