a) Apotema piram = √12²+apotema bazei²= √12²+5²=√169=13
b)A t= Ab +Al= 10²= 4*10*13/2=100+260=360cm²
c)Arie TBD= BD *OT/2
cum BD=constant⇒OT minim⇒OT⊥VC
OT inaltimea coresp ipotenuzei in tr drVOC,
VO=12
OC=5√2, jumatate de diagonala
VC (Pitagora )=√(12²+(5√2)²)=√(144+50)=√194
Teo catetei in tr dr VOC
VO²=VT*VC
VT= VO²/VC
VT=144/√194=(144√194)/194=(72√194)/97
