Answer:
1. 45°
2. 80°
3. 70°
4. π/3
Explanation:
1. 720 - 675 = 45
2. 180 - 100 = 80
3. 360 - 290 = 70
4. 10π/3 - 3π = 10π/3 - 9π/3 = π/3
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