For triangles, all angles total 180°
For quadrilaterals, all angles total 360°
Parallelograms have equal opposite angles, so each adjacent pair is 180°
Hexagons are 720°
3. 180 - (90 + 30) = 180 - 120 = 60°
4. 180 - (45 + 45) = 180 - 90 = 90°
5. 360 - (135 + 70 + 93) = 360 - 298 = 62°
6. 180 - 60 = 120°
7. 180 - (120 + 37) = 180 - 157 = 23°
8. Perfect hexagon: 120°
9. Parallelogram: 70°
10. 360 - (90 + 90 + 67) = 360 - 247 = 113°
