Szczegółowe wyjaśnienie:
r=2/3×h
h=9cm
[tex]6 = \frac{a \sqrt{3} }{3} \\ 18 = a \sqrt{3 } \\ a = \frac{18}{ \sqrt{3} } [/tex]
[tex]p = \frac{1}{2} a \times h \\ p = \frac{1}{2} \times \frac{18}{ \sqrt{3} } \times 9 = \frac{81}{ \sqrt{3} } [/tex]
[tex]p = \frac{81}{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{81 \sqrt{3} }{3} = 27 \sqrt{3} [/tex]
