Question

Objętość graniastosłupów

http://img708.imageshack.us/i/obraz047l.jpg/
zad 12 c)

http://img412.imageshack.us/i/obraz049o.jpg/
zad 11 c)

Z góry dzięki ;)
Dam najjjj ;**

Answer 1

12.c) V = PpH
H = 4
a1 = 8
Pp1 = 6 * (8^2 {3}) /4 = 6 * 64{3} /4 = 6 * 16{3} = 96{3} [j^2]
V1 = 96{3} * 4 = 384{3} [j^3]
a2 = 4
Pp2 = 6 * (4^2 {3}) /4 = 6 * 16{3} /4 = 6 * 4{3} = 24{3} [j^2]
V2 = 24{3} * 4 = 96{3} [j^3]
V3 = V1 - V2
V3 = 384{3} - 96{3} = 288{3} [j^3] = 288 * 1,7 = 489,6 [j^3]
{ } pierwiastek

11.c) V = PpH
Pp1 = 5 * 5 = 25 [j^2] -->pole kwadratu
Pp2 = [(5 +11) * 4] /2 = [16 * 4] /2 = 32 [j^2] -->pole trapezu
Pp = 25 + 32 = 57 [j^2]
V = 57 * 8 = 456 [j^3]