[tex] \frac{a}{3} [/tex]=[tex] \frac{b}{4} [/tex]=[tex] \frac{c}{5} [/tex]=K
=> a=3K b=4K si c=5K deci avem 3K+4K+5K=60 grade, de unde avem 12K=60 grade deci K=5 grade => a=15 grade, b=20 grade, c=25 grade , iar daca verifici vei observa ca suma ne da 60 grade..... SPER CA TE-AM AJUTAT ;)
