grade 1- GEOMETRY

USE OF SET SQUARE -http://ntic.educacion.es/w3//eos/MaterialesEducativos/mem2001/dibujotecnico/Construcciones%20de%20dibujo%20tecnico/msp_cb.htm

PERPENDICULAR BISECTOR OF A LINE SEGMENT - http://www.mathopenref.com/constbisectline.html

PERPENDICULAR TO A LINE AT A POINT ON THE LINE- http://www.mathopenref.com/constperplinepoint.html

PERPENDICULAR TO A LINE FROM AN EXTERNAL POINT- http://www.mathopenref.com/constperpextpoint.html

PERPENDICULAR TO A RAY AT ITS ENDPOINT - http://www.mathopenref.com/constperpendray.html

PARALLEL LINE TO OTHER FROM AT A POINT - http://www.mathopenref.com/constparallel.html

DIVIDING A LINE SEGMENT INTO "n" SEVERAL EQUAL PARTS - http://www.mathopenref.com/constdividesegment.html

COPYING AN ANGLE - http://www.mathopenref.com/constcopyangle.html

BISECTING AN ANGLE - http://www.mathopenref.com/constbisectangle.html

CONSTRUCTING A 60º ANGLE - http://www.mathopenref.com/constangle60.html