👉 Protractile is a type of scientific instrument that was traditionally used for drawing straight lines and curves in geometry. It consists of a series of curved pieces, known as "protons," attached to a fixed point on a table or a stand. The protractor itself is usually made of metal or plastic, but can also be made of wood or other materials depending on the purpose of the instrument. The protractile was originally used for measuring angles in geometry and trigonometry. It has been
