*Read book: pages 49, 50 y 51 (relative positions of straight lines)
*2 tasks: parallel and perpendicular lines on a famous drawing and animal in 4 parts with different techniques.
______________________________________
We are going to work with TECHNICAL DRAWING.
- MATERIALS:
- H pencil (harder and lighter pencil in pencil scale).
- Compass (to draw arcs and circles)
- Ruler (to measure and draw)
- Set squares (to draw parallel and perpendicular lines)
- Eraser (to wipe off)
- Sharpener (to sharpen pencils)
- Colours (to take notes)
- Dark marker or pen (to trace the result, titles and name)
- VOCABULARY (+ drawings)
- Straight line
- Dashed line
- Curved line
- Thick / thin line
- Harder / lighter line
- Parallel lines
- Perpendicular lines
- Point
- Segment
- Ray -> Semirrecta
- Angle
- Arc
- Circumference
- Circle, triangle, square
- Perpendicular bisector -> Mediatriz
- Bisector -> Bisectriz
- Radius
- Diameter
- To draw a line X cm long
- To trace a line -> Repasar la línea
- To divide into equal parts
- To measure
- To join points
- To center the compass
- To add up segments/angles
- To subtract segments/angles
Let's remember how to use the set squares (escuadra y cartabón).
We use them to draw parallel and perpendicular lines:
- Parallel lines: are lines in a plane that are always the same distance apart.
- Perpendicular lines: are lines that intersect at a right (90 degrees) angle.
How do we use the set square?
You have to handle your set square softly and with accuracy without exercising too much pressure on them, only the needed one to avoid movement.
PARALLEL LINES
- The 45 set square hypotenuse (longest side) is placed attached to the line to which we want to draw the parallels (GUIDE).
- The 60-30 set square hypotenuse is attached to the 45 set square leg.
- Fix the 60-30 set square and move the 45 set square upwards or downwards drawing the desired parallel lines along its hypotenuse.
PERPENDICULAR LINES
If we want to draw perpendicular lines to one direction, we will have to follow the first two steps as stated for parallel lines and then the following ones:
- Having fixed the 60-30 set square, the 45 set square is turned until the other leg is attached to the hypotenuse of the 60-30 set square.
- Draw the perpendicular line along the hypotenuse of the 45 set square.
*IF YOU ARE RIGHT HANDED*
*IF YOU ARE LEFT HANDED*
*MANDATORY ACTIVITY 1: Choose a famous drawing to complete it with straight lines (parallel, perpendicular, different distances...). Upload the task working with parallel and perpendicular lines. Take the picture, edit the photo and upload them to the next Padlet.
*Hannah has prepared this presentations with some exmaples of famous paintings that you can choose: link.
What you will have at the end:
*Examples of other year here (parallel and perpendicular lines).
Open Padlet bigger here.
