a)
[tex]P=2\sqrt{3}*\sqrt{3}=2*3=6[/tex]
[tex]Obw=2*2\sqrt{3}+2*\sqrt{3}=6\sqrt{3}[/tex]
b)
[tex]P=\frac{1}{2}*6\sqrt{3}*3\sqrt{5}=9\sqrt{15}[/tex]
[tex]Obw=6\sqrt{5}+3\sqrt{5}+8\sqrt{2}=9\sqrt{5}+8\sqrt{2}[/tex]
c)
[tex]P=\frac{1}{2}*(2\sqrt{3}+5\sqrt{3})*\sqrt{3}=\frac{1}{2}*7\sqrt{3}*\sqrt{3}=\frac{1}{2}*21=\frac{21}{2}=10.5\\[/tex]
[tex]Obw=5\sqrt{3}+2\sqrt{3}+2*3\sqrt{2}=7\sqrt{3}+6\sqrt{2}[/tex]
