protractort

The term "protractort" appears to be a misspelling or a non-standard term. It is highly likely that the intended word is "protractor."

A protractor is a common measuring instrument used in geometry to measure angles. It is typically a semicircular or circular disk, made of transparent plastic or metal, with degree markings along its curved edge. The markings range from 0 to 180 degrees for a semicircular protractor, and 0 to 360 degrees for a circular protractor.

To use a protractor, one aligns the base of the protractor with one side of the angle being measured, ensuring that the center mark (often a small hole or crosshair) is placed precisely at the vertex of the angle. Then, the degree marking that aligns with the other side of the angle indicates its measurement. Protractor comes in various sizes and forms, including digital versions that provide an electronic readout of the angle. They are essential tools for students in mathematics and technical fields, as well as for architects, engineers, and craftspeople.