a+b+c=429
a /-------/-------/
b /------/-------/---/ (in segmentul mic punem 27)
c /------/-------/---/---/ (in primul segment mic punem 27 iar in al doilea punem 15)
429-27-27-15=360 (egalarea segmentelor)
360 : 6 = 60 (un segment)
60 + 60= 120 (a)
120+27= 147 (b)
147+15= 162 (c)