Răspuns :
aplic teorema inaltimii in trg ABC ⇒ AD^2=BD*CD=16*9=144 ⇒ AD=12 cm
Aplic T Pitagora in trg ABD si am
AB^2=AD^2+BD^2=144+81=225 cm^2 ⇒ AB=15 cm
Aplic T Pitagora in trg ABD si am
AB^2=AD^2+BD^2=144+81=225 cm^2 ⇒ AB=15 cm