Răspuns :
Ab=l²=24²=576 cm²
V=Ab*h /3 =576*9 /3=576*3=1728cm³
d=l√2=24√2 cm
h intr-o fata laterala ( prin Pitagora) => EF²=OF²+OE²
EF²=12²+9²=144+81=225 => EF=15 cm (h in triunghiul de pe fata laterala BEC,unde E-varful)
A BEC=l*h/2=24*15/2=12*15=180cm²
A lat=4*A BEC =4*180=720cm²
V=Ab*h /3 =576*9 /3=576*3=1728cm³
d=l√2=24√2 cm
h intr-o fata laterala ( prin Pitagora) => EF²=OF²+OE²
EF²=12²+9²=144+81=225 => EF=15 cm (h in triunghiul de pe fata laterala BEC,unde E-varful)
A BEC=l*h/2=24*15/2=12*15=180cm²
A lat=4*A BEC =4*180=720cm²