Odpowiedź:
wzór na pole powierzchni prostopadłościanu
Pp = 2 * (a * b) + 2 * (b * c) + 2 * (a * c)
1.
a = 3 m
b = 4 m
c = 6 m
Pp = 2 * (3 * 4) + 2 * (4 * 6) + 2 * (3 * 6)
Pp = 2 * 12 + 2 * 24 + 2 * 18
Pp = 24 + 48 + 36
Pp = 108 [tex]m^{2}[/tex]
2.
Pp = 2 * (2 * 8) + 2 * (8 * 6) + 2 * (2 * 6)
Pp = 2 * 16 + 2 * 48 + 2 * 12
Pp = 32 + 96 + 24
Pp = 152 [tex]dm^{2}[/tex]
3.
Pp = 2 * (3 * 5) + 2 * (5 * 10) + 2 * (3 * 10)
Pp = 2 * 15 + 2 * 50 + 2 * 30
Pp = 30 + 100 + 60
Pp = 190 [tex]cm^{2}[/tex]
4.
a = 20 cm
b = 700 mm = 70 cm
c = 1 m = 100 cm
Pp = 2 * (20 * 70) + 2 * (70 * 100) + 2 * (20 * 100)
Pp = 2 * 1400 + 2 * 7000 + 2 * 2000
Pp = 2800 + 14000 + 4000
Pp = 20800 [tex]cm^{2}[/tex]
5.
a = 0,06 m = 6 cm = 60 mm
b = 0,4 dm = 4 cm = 40 mm
c = 90 mm
Pp = 2 * (60 * 40) + 2 * (40 * 90) + 2 * (60 * 90)
Pp = 2 * 2400 + 2 * 3600 + 2 * 5400
Pp = 4800 + 7200 + 10800
Pp = 22800 [tex]mm^{2}[/tex]
robiłem na WF
