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Intr-un triunghi dreptunghi in A,AD-inaltime,cunoastem AB=15,AD=12 si BD=9 aflati BC,AC...


Răspuns :

AB²=BC·BD
15²=BC·9
225=BC·9
BC=225/9
BC=25
AC²=BC²-AB²=25²-15²=625-225=400
AC=√400=20