a) d²=a²+b²+c²
d²=36+108+81=225
d=√225=15
b) A totala= A laterala+A bazelor
A laterala=P*c
P=2(a+b)=2(6+6√3)=12+12√3
A laterala= (12+12√3)*9=108+108√3
A bazelor= 2ab=2*6*6√3=62√3
A totala= 108+108√3+32√3=108+140√3
c) V = abc= 6*6√3*9=324√3