Odpowiedz
Obliczamy pole :
Pp= Ptrójkata = P = a*h/2= 4*4/2= 16/2 = 8 cm2
H = 7cm
Pb = Obwp * H = 4 + 4 + 4 = 12 * 7 = 84cm2
Pcałkokowite = 2Pp+ Pb = 2 * 8 cm2 + 84cm2 = 16cm2 + 84cm2 = 100cm2
liczymy objętosc:
Vgraniastoslupa = Pp * H = 8cm2 * 7cm = 56cm3
Pp = 8cm2
H = 7cm
licze na naj!!!