Question

Piramida hexagonala regulata VABCDEF are AB=6cm si inaltimea VO=3cm Calculati: a) aria laterala a piramidei ; b) volumul piramidei

Answer 1

Al=Pb*ap supra 2 
Pb =6*l
Pb= 6*6
Pb=36
 ap²= h²+ ab²
ap² = 3²+ 3²
ap²= 18⇒ap =√18 = 2√3

Al= 36*2√3 supra 2 = 36√3

v= Ab*h supra 3
Ab= 3l²√3 supra 2
Ab= 3*6²√3supra 2
Ab=54√3

v= 54√3*3 supra 3
v=54√3

Sper sa fie corect