1. With A as centre and radius greater than 1/2 AB, draw two arcs, one on either side of line AB. 2. With centre B, and the same radius (as in step 1), draw two arcs, intersecting the arcs of step 1 at C and D. 3. Draw the line CD. Line CD is the required perpendicular bisector of AB. https://www.expertsmind.com/course-help/?p=construction-98734287129