<) A+B+C =180 grade
A/3=B/2=C/1
A/3+B/2+C/1 =A+B+C/3+2+1 =180/6 =30
A/3 =30 => A=3*30 =90 gr
B/2 =30 => B=2*30 =60 gr
C/1 =30 => C =1*30 =30 gr
=> triungh. ABC = dreptunghic
AB = BC/2 =10/2 =5cm (cateta opusa <) de 30 gr. = 1/2 din ipotenuza)
AM =MEDIANA = 1/2 din ipotenuza =5 cm (IN TRUNGH. DREPTUNGHIC MEDIANA = 1/2 din ipotrnuza)
=>AB=BM=AM = 5 cm
P triungh.ABM =3*5 =15 cm