Basic Constructions

Copy a segment:http://www.mathopenref.com/constcopysegment.html

Perpendicular Bisector:http://www.mathopenref.com/constbisectline.html

Copy and angle:http://www.mathopenref.com/constcopyangle.html

Bisect and angle:http://www.mathopenref.com/constbisectangle.html

Perpendicular bisector through a point not on the line: http://www.mathopenref.com/constperpextpoint.html

Perpendicular through a point on the line: www.mathopenref.com/constperplinepoint.html