PRACTISING WITH LIBRE CAD/ QCAD Exercises to use coordinates 1. Draw a rectangle with these coordinates in the squares: Point 1: 40, 40 Point 2: 70, 40 Point 3: 70, 60 Point 4: 40, 60 Point 5 = Point 1: 40, 40 2. Draw another rectangle with these coordinates in the squares: Point 1: 60, 20 Point 2: @30, 0 Point 3: @0, 20 Point 4: @-30, 0 Point 5 = Point 1: @0, -20 3. Draw another rectangle with these coordinates in the squares: Point 1: 50, 0 Point 2: @30<0 Point 3: @20<90 Point 4: @30<180 Point 5 = Point 1: @20<-90 4. Draw a straight line a) Horizontal line starting (40, 60) rightward 50 mm. b) Vertical line starting (55, 65) upwards 30 mm. c) Horizontal line starting (30, 90) leftward 60 mm. d) Vertical line starting (20, 120) downwards 80 mm
Exercises with reference to objects 5. a) Draw a square 60 mm side using four straight lines. Now, draw four lines that they start and finish in the middle points of the each square side. b) Draw tree lines: R---- from (30,180) to (50, 250) S---- from (70, 240) to (110, 160) T---- from ( 140, 200) to (70, 220) Then, you have to draw another line that start in the R endpoint and finish in the S and T intersection. (Use snaps to endpoints and snap to intersections automatically) 6. Draw a square 80 mm side. Then, draw another one inside using snap to the middle points. Repeat again to draw something like this.
7. Draw a square 64 mm side. Then draw some parallel and perpendicular lines to the sides at a distance of 16 mm. At last, join the diagonals of the small squares using snap to intersections automatically.
DRAWINGS WITH DIMENSIONS. MODIFY --- ATRIBUTES ----ARROW (AT THE LEFT)--- WIDHT 0.70 (ISO) 8. Draw a square 50 mm side.
9. Draw an equilateral triangle 70 mm side.
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