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2014-05-16T09:57:10+03:00
BC²=AB²+AC²
20²=12²+AC²
400=144+AC²
AC²=400-144
AC²=256
AC=16cm
2014-05-16T09:58:58+03:00
Aplicam Pitagora
AB=cateta=12
BC=ipotenuza=20
AC=Cateta=?

BC^2=-AB^2+AC^2
20^2=12^2+AC^2
400=144+AC^2
AC^2=400-144
AC^2=256
AC= radical din 256
AC=16

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