Daca ungh B=60=>unghC=30 . Fie tr ADC conf th ungh 30 grade AC=2AD=12. In acelasi triunghi aplicam th Pitagora DC patrat=AC patrat-AD patrat=144-36=108 => DC=6 radical din3. Fie tr ABC => conf th inaltimii AD patrat=BD*DC => 36=BD*6rafical din3 => BD=2 rafical din3 =>BC=8 radical din 3. Tr ABC => conf th pitagora AB patrat=BC patrat-AC patrat=192-144=48 => AB=4radi al din3 => P ABC=4 radical din3+8 radical din3+12=12(radical din3+1)
