
TIME REQUIRED:
DIFFICULTY:
COST:
MATERIALS
» Plastic sheet, plywood, or solid wood, 1/8 "
thick, 8"×12"
» Machine screw, #6×½", with wing nut and 2
washers
» Printed paper template free download from
makezine.com/go/sector
TOOLS
» Ruler
» Glue or spray adhesive for printed template
» Fine tip marker or engraving tool (optional) if
you’re not using the template
» Drafting divider
» Band saw, jigsaw, or small hand saw
» Electric drill and 9/6 4 " bit
The sector, also known as the compass of
proportion, is a fun and easy-to-use calculating
device that uses the power of geometry to
perform a variety of useful math jobs. Although
at first glance ...