If the strange-looking object doesn’t immediately bring to mind a protractor — the flat, metal or plastic, typically half-disc drawing tool used to measure angles — don’t be alarmed; since ...

Unless you're an architect or an engineer, it's probably been years since you last used a protractor in geometry class. But, now the semi-circular tool is showing up in some odd places around town ...

A rectangular protractor has the angle markings around three edges of a rectangle instead of along the arc of a circle or half-circle. The object looks like a ruler and fits neatly inside a pocket or ...

Physicist Amelia Sparavigna recently identified an artifact in a Turin museum as the world’s first known protractor. Sparavigna argues that the artifact’s ornate decoration, which resembles a ...

The protractor is contained in a paper envelope, which also holds a sheet of instructions written by Penfield. The envelope is imprinted: ARM PROTRACTOR AND GONIOMETER. It is also stamped: Cenco 88210 ...