Odpowiedź:
1.
Pb = 4 * a * 10 = 80
40a = 80 / 40
a = 2 cm
Pp = 2 * 2 = 4 cm^2
Pc = 2Pp + Pb = 2 * 4 + 80 = 88 cm^2
V = 4 cm^2 * 10 cm = 40 cm^3
2.
a)
V = 3^3 27 cm^3
Pc = 6 * 3 * 3 = 6 * 9 = 54 cm^2
b)
a[tex]\sqrt{2}[/tex] = 6/√2 / [tex]\sqrt{2}[/tex]
a = 6 cm
V = a^3 = 216 cm^3
Pc = 6*6 *6 = 216 cm^3
c)
a√3 = 6 cm /√3
a = 6/√3 cm
Pp = (6/√3)^2 = 12 cm^2
V = 12 cm^2 * 6/√3 = 72/√3 = 24√3 cm^3
Pc = 6 * 12 = 72 cm^2
3.
Pp = (a^2[tex]\sqrt{3}[/tex])/4 = 36√3/4 = 9√3 cm^2
V = 9√3 cm^2 * 7 cm = 63√3 cm^3
Pc = 2 * 9√3 cm^2 + 3 * (7*6) = 126 + 18√3 cm^2