ARCHONOS: PIVOTING PROTRACTOR–RULER MEASUREMENT TOOL

In one embodiment, a measurement tool comprises: • abase bodydefining apivot region and one or more indexing features configured to register against an edge, corner, or vertex of a workpiece;• a rotatable arm coupled to the base body at the pivot region, wherein the rotatable arm includes a linear measurement scale (ruler scale) along a length of the arm; • an angular measurement scale (protractor scale) associated with relative rotation between the base body and the rotatable arm; and • one or more locking, detent, or friction mechanisms configured to hold the arm at selected angles. The tool enables a user to place the base body against a reference edge or corner, rotate the arm to a desired angle (readable from the angular scale), and measure/mark distances along the arm (readable from the linear scale), thereby providing a combined protractor and ruler functionality with improved repeatability and alignment.