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Segitiga (i)
3a+2a+35 =180°
5a+35 =180°
5a =180°-35
5a =145°
a =145° : 5
a =29°
segitiga (ii)
2b+2b+2b=180°
6b =180°
b =180° : 6
b = 30°
Segitiga (iii)
3c+c+c=180°
5c =180°
c =180° : 5
c =36°