Construct with ruler and compasses, angles of following measures: (a) 60° (b) 30° (c) 90° (d) 120° (e) 45° (f) 135°

How to construct (draw) a 45 degree angle with compass and straightedge or ruler - Math Open Reference

Draw an angle of 40°. Copy its supplementary angle. We will be using the concept of angles to solve this