Graphite pencil - The instrument we usually use to draw. For technical drawing, the best pencils to use are hard ones (2H or 3H), Mechanical or propelling pencil - A pencil whose lead is pushed forward by a mechanical device, Stylograph - This is a tool we use for ink drawings. There are two types: reusable ones or disposable ones, Felt pens - A pen that has a point made of felt (= a thick, soft mass of fibres), used for writing and especially drawing, The rubber (UK) / the eraser (USA) - It is used to eliminate incorrect or extra lines., The compass - This tool is used to make arched lines and circles. Compasses are usually made of metal or plastic, and consist of two "legs" connected by a hinge which can be adjusted to allow changing of the radius of the circle drawn., Lead (compass) - In a compass, it draws the circle on a particular paper or material., Needle point (compass) - In a compass It is located on the steady leg, and serves as the center point of the circle that is about to be drawn, Compass hinge - In a compass, It is the wheel we use to decide the radius of the circle., Graph paper - It has milimetre squares printed on it that help us draw graphs and charts. It can be opaque or transparent., Tracing paper - Because it is transparent, waterproof and resistant, we use this type of paper for tracing pictures, Graduated ruler - This is a precision tool we use to measure distances., 45º set square - It is an isosceles triangle. Two equal sides make a 90º angle and iths hypotenuse forms a 45º angle with each of the other two sides., 60º set square - It is a scalene triangle. The hypotenuse makes a 60º angle with one of the sides and a 30º angle with the other, Protractor - It is used to transfer and measure angles., Pencil sharpener - It is a tool for sharpening pencils., Straight line - a sequence of points in the same direction, Ray - it is a line which has a boundary on one side and is infinitive on the other side, Segment - It is a line with 2 boundaries, Curved line - It is a continuous sequence of points that changes direction. They can be open, closed or wavy., Point - It is the intersection of two straight lines or two arcs., Line - It is set of points extending in either direction infinitely, Parallel lines - These are lines that never intersect, Perpendicular lines - These are lines that intersect at a 90-degree, Intersecting lines - These are lines that do not meet a 90-degree angle, Skew lines - These are lines that have no points in common because each line is in a separate plane, Plane - Two intersecting straight lines or 3 points that are not aligned define a...,

Geometry elemens and technical drawing tools

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