piramida ABCD
ducem inaltimea VO = 16 cm
ducem apotema VM=20 cm
in triunghiul dreptunghic VOM aplicam Teorema lui Pitagora :
OM=√(20²-16²)=√(400-256)=√144=12 cm
AB=2×12=24 cm
a)At=Al+Ab=960+144=
Al=P×ap/2=24×4×20/2=960 cm²
Ab=24×24=576 cm²
At=960+576=1536 cm²
b)V=Ab×h/3=576 ×16/3=3072 cm³
