Step-by-step explanation:
- To construct 30° first you construct 60° then half of 60° it will be 30°
- To construct 45° first you construct 60° then 30° then 15° then you add 15°+30°=45°
- To construct 75° first construct 60° then 30° then 15° then add 60°+15°=75°
- To construct 90° you construct a perpendicular bisector
- To construct 105° you first construct 90° then 120° then 105°
- To construct 135° you first construct 90° then 120° then 135°
