Answer:
1. Angle 1 and Angle 8; Angle 5 and Angle 4
2. Angle 2 and Angle 7; Angle 6 and Angle 3
3. Angle 1 and Angle 6; Angle 2 and Angle 5;
Angle 3 and Angle 8; Angle 4 and Angle 7
4. Angle 1 and Angle 4; Angle 5 and Angle 8
