Answer:
910
Step-by-step explanation:
The answer is 21 ,
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Below is an attachment containing the solution.
∠1 + ∠3 + 90° = 180°
∠1 + ∠3 = 90°
∠3 = ∠4 (vertically opposite angles)
∠1 + ∠4 = 90°
Therefore, the answer is ∠1 + ∠4
the difference is 56 because if you add and divide them by 3 and -2 you will get 56
