Look at these drawings. How are they different?
Technical drawing is a “universal language” used in the creation of any man-made object. It gives us the necessary information to fabricate any object.
Can you think of any tools we might use? ď‚ž A ruler: is used to draw straight lines and to measure. ď‚ž
Set squares are used to draw lines, parallels and perpendiculars. ď‚ž They are both right triangles (triangles with one right angle). ď‚ž One is an isoceles triangle and the other is a scalene triangle. ď‚ž
The compass is used to draw archs and circles.
Paper is the surface for technical drawings. ď‚ž The sizes of the paper are normalized. The largest is A0 and the smallest is A8. ď‚ž
Pencils are the medium for technical drawing. ď‚ž They range from 6H (the hardest) to 8B (the softest). ď‚ž
A ray is a line the ends in a point but continues with an infinite line
A segment is a line that ends in two points
An angle is the space between two intersecting lines.
There are four types of angles: › Acute: Angles that measure less
than 90º › Right: Angles that measure 90º › Obtuse: Angles that measure
more than 90º › Straight: Angles that measure
The drawing of perpendicular, parallels, and angles are fundamental when drawing more complex geometric constructions.
Take your compass, ruler, set squares and pencil.
The bisector is the perpendicular line that divides a segment in two equal parts. Follow the steps: http:// www.mathopenref.com/constbisectline.htm
Using the skills you have learned, try to replicate the shape below:
We will design the house of your wildest dreams! ď‚ž Take a look at some famous architecture ď‚ž
• Requirements for the dream house design: • Draw the floor plan and the front elevation. • Include at least 1 circle, 1 square or rectangle, 1 triangle and 1 hexagon. • Extra points: draw the isometric perspective