Răspuns :
P=peri,,M=meri=P+14,,C=ciresi=P+M=P+P+14 P+M+C=80 P+(P+14)+(P+P+14)=80,,,,,,,,4P+28=80,,,4P=80-28=52,,P=52:4=13,,,,,P=13,,, ,M=13+14=27,,M=27 C=13+27=40,,,,P+M+C=13+27+40=80
M.I____I14I
P. I____I
C.I____I____I14I
80-28=52 suma partilor egale
52:4=13 Peri
13+14=27 Meri
13x2+14=40 Ciresi
Verificare : 40+27+13=80
P. I____I
C.I____I____I14I
80-28=52 suma partilor egale
52:4=13 Peri
13+14=27 Meri
13x2+14=40 Ciresi
Verificare : 40+27+13=80