CIRCLE: It’s a set of points at the same distance to a point called center.

CIRCUNFERENCE: Geometric figure bounded by a circle.

CENTER: It’s a point that have the same distance to any point of the circle.

RADIUS: It’s any segment that joins the center to any point on the circunference.

DIAMETER: It’s any segment that joins the Center to any point on the circunference.

CHORD: It’s a line segment which connects 2 points of the circle.

ARC: It’s a line segment of a circle.

LINE/THECNICAL DRAWING: It's a drawing with  th help of supplies. It's usually yhe kind of drawing used for architecture or  enginier plans.

COMPASS: It's a tool for drawing circles and arcs and also for measuring distances between points, consist of two arms linked by a hinge.

FREEHAND: Draw without guiding instruments, measurements.

PROTACTOR: An instrument for measuring of drawing angles on paper, usually a flat semicircular transparent plastic sheet graduates in degrees.

SET SQUARES: They are two especial rulers with a triangular shapes. One is called the 45º and the other is called 60º/30º  triangle. Both have the 90º angle and use for made angles and paralels lines.

ERASER: It can clear some draw making with pencil.

RULER: It's an object this object can measure centimetres and milimetres.

PROTACTOR: An instrument for measuring of drawing angles on paper, usually a flat semicircular transparent plastic sheet graduates in degrees.