aria bazei Ab
Ab=l^2√3/4=9√3/4, l este latura bazei=muchia prismei
aria laterala Al
Al=3 x 3 x 3=27 cm2
aria totala At
At=2Ab+Al=9√3/2 + 27=9(√3/2 + 3)=9(6+√3)/2 cm2
volumul V
V=l x Ab=3 x 9√3/4=27√3/4 cm3
am presupus ca sti relatia dintre inaltimea h si latura l intr-un triunghi echilateral
h=l√3/2 si aria A=l^2√3/4
