Răspuns:
a + b + c + d = 178
a |...........|
b |...........|......|
+5
c |...........|......| } 178
+13
d |...........|......|......|
+13 +15
1) Egalăm segmentele
178 - ( 5 + 13 + 13 + 15) = 132
178 - 46 = 132
2) 132 : 4 = 33
a = 33
b = 33 + 5 = 38
c = 33 + 13 = 46
d = 33 + 13 + 15 = 61