Tr. ABC , MASURA UNGHI A = 90 GRADE , MASURA UNGHI C=30 GRADE ADPERPENDICULAR PE BC , D APARTINE BC , AB =5 , BC=13 . AFLATI AC, BD, DC !! VA ROG URGENT AM TEZA LA MATE
cu Pitagora AC²=CB²-AB²=169-25=144 AC=12 cm cateta care se opune unghiului de 30*=ipotenuza/2 AD=12/2=6 cm teorema catetei AB²=BD.BC 25=BD.13 BD=25/13 cm DC=BC-BD=13-25/13=(169-25)/13=144/13 cm
