45 Degree Angle

How to construct a 45 Degree Angle
using just a compass and a straightedge

Steps:

  • Construct a perpendicular line
  • Place compass on intersection point
  • Adjust compass width to reach start point
  • Draw an arc that intersects perpendicular line
  • Place ruler on start point and where arc intersects perpendicular line
  • Draw 45 Degree Line