Answer:
138
Step-by-step explanation:
Hexagon total angle = 720
170+ 277 + 135 = 582
720 - 582 = 138
9
5+4=9
3/8 + 2/5
= (3/8 × 5/5) + (2/5 × 8/8)
= 15/40 + 16/40
= 31/40