Răspuns:
..⃗. RASPUNS ࠜೄ ・゚ˊˎ
ABC triunghi dreptunghic => (teorema inaltimii) AD=√CD×DC
AD=√3×27=√81=9 cm
BC=CD+BD=27+3=30
=> (teorema catetei) AB=√BC×CB=√30×27= √810= 9√10 cm
=> (teorema catetei) AC= √BC×CD=√30×3=√900=30 cm
P(ABC)= AB+BC+AC= 30+9√10+9=39+9√10