Răspuns:
4. inversul lui -3,2 este -1/3,2= [tex]-\frac{1}{\frac{32}{10} } =-\frac{1}{\frac{16}{5} }[/tex] = -1*5/16= -5/16
5. are 5 fete (prisma triunghiulara)
6. S=6m
36=6m=> m=6cm
Aria totala= [tex]4*\frac{m^2 \sqrt[]{3} }{4}[/tex]=[tex]m^2\sqrt{3}[/tex]=[tex]36\sqrt{3}[/tex] [tex]cm^{2}[/tex]
