L=12
muchia=10
L/2=6
a) apotema piramidei=√(10²-6²)=√(100-36)=√64=8 cm
b)apotema bazei =L√3/6=12√3/6=2√3 cm
c)inaltimea piramidei= √(12²-6²)=√(144-36)=√108=6√3 cm
d)Aria laterala=Pb×apotema piramidei/2 =3×12×8/2=144 cm²
e)Aria totala a piramidei=Al+Abazei=144+36√3=36(4+√3) cm²
Abazei=L²√3/4=144√3/4=36√3 cm²
f)Volumul piramidei=Abazei×h/3=36√3 × 6√3/3=216 cm³