Construction Steps
Draw segment a = AB between points A and B
Construct perpendicular line b to segment AB through point B
Construct circle c with center B through point A
Intersect circle c with perpendicular line b to get intersection point C
Construct perpendicular line d to segment AB through point A
Construct circle e with center A through point B
Intersect perpendicular line d with circle e to get intersection point D
Create polygon ABCD (Don’t forget to close the polygon by clicking on point A after selecting point D.)
Hide circles and perpendicular lines
Perform the drag test to check if your construction is correct