GEOMETRY DRAWING AND SUPPLIES CONCEPTS AND DEFINITIONS

Freehand: Drawn by hand whithout guiding instruments, measurements.

Line/Technical drawing: It is a drawing made with the help of supplies. It is usually the kind of drawing used for aechitecture or enginering plans.

Compass: It is a tool for drawing circles and arcs and also for measuring distances between points, consisting of two arms linked by a hinge.

Protactor: An instrument for measuring or drawing angles on paper, usually a flat semicircular transparent plastic sheet graduated in degrees.

Set squares: They are two special rulers with a triangular shape. One is called the 45º triangle and the other the 30/60º triangle. Both have the 90º angle. So, they are used to draw certain angles and also to draw parallel lines.

Eraser: An object, such as a piece of rubber, used for deleting something.

Marker: A pen having a writing point made from pressed fibres.

Ruler: An instrument used to draw straight lines. Also called straight edge.