Cześć!
Zadanie 4
V=1/3Pp*H
Liczymy pole podstawy:
12cm*5cm=60cm2
Wysokość mamy 12cm
[tex]v = \frac{1}{3} \times 60 \times 12 = v = 20 \times 12 = 240 {cm}^{3} [/tex]
Zadanie 5
Pc=2Pp+Pb
[tex]pp = \frac{ {a}^{2} \sqrt{3} }{4} = \frac{ {8}^{2} \sqrt{3} }{4} = \frac{64 \sqrt{3} }{4} = 16 \sqrt{3} [/tex]
Pb=3*(8*6)=3*48=144cm2
[tex]pc = 16 \sqrt{3} + 144 {cm}^{2} [/tex]
Pozdrawiam!