[tex]v = \frac{1}{3} \times pp \times h[/tex]
H=12cm
[tex]pp = \frac{a \times h}{2} = \frac{9 \times 9}{2} = 40.5 {cm}^{2} [/tex]
[tex]v = \frac{1}{3} \times 40.5 \times 12[/tex]
[tex]v = 40.5 \times 4[/tex]
[tex]v = 162 {cm}^{3} [/tex]
Pc=pp+pb
[tex]pb = \frac{12 \times 9}{2} = \frac{108}{2} = 54 {cm}^{2} [/tex]
[tex]54 {cm}^{2} \times 3 = 162 {cm}^{2} [/tex]
Pc=162cm2+40,5cm2=202,5cm2
Pozdrowionka! ~Wika
