Answer:
360
Explanation:
The inside corners of an equilater trinagle measure 60 degrees
Besides: ∠M + ∠N = 180 because supplementary angles
∠M + 60 = 180 --> ∠M = 120
Same reasoning for the pair ∠Q , ∠R and for the pair ∠X , ∠top insideangle
Hence ∠R = 120 and ∠X = 120
Therefore, the sum of the exterior angles is
∠M + ∠R + ∠X = 360