D4. Computer aided design LibreCad.

Open the program LibreOffice,
Complete the exercises one in one layer. To keep them in one file. In each exercise difficulty and autonomy will be increased.
Then save them as D4_NameSurname.dxf with the format dxf
Also Export them as an image.
Finally upload all the exercises to the aula virtual.

Drawing lines exercises.

Exercise1.

Command line exercises. Draw three rectangles, drawing lines by two points adding their coordinates in the command bar line. The command line is in view menu/toolbars/command line Dont type the parenthesis in the command line.

Rectangle1. Draw a rectangle that has the following Absolute coordinates of its corners referred to the origin:

Point 1: (30, 30)

Point 2: (60, 30)

Point 3: (60, 50)

Point 4: (30, 50)

Point 5Ξ1: (30, 30)

Rectangle 2: Draw another rectangle whose coordinates are, @coordinates refers to the previous point, relative coordinates:

Point 1: (70, 30)

Point 2: (@30, 0)

Point 3: (@0, 20)

Point 4: (@-30, 0)

Point 5=1:(@0, -20)

Rectangle 3: Draw the same rectangle whose coordinates are, the number is the lenght of the line and the braket < defines the angle, polar coordinates:

Point 1: (30, 0)

Point 2: (@30<0)

Point 3: (@20<90)

Point 4: (@30<180)

Point 5Ξ1: (@20<-90)

A shortcut: instead of typing the coordinates of point 5, type: "c" and press "enter".

Exercise2.

Vertical and horizontals. Draw the following lines: To do this exercise create a new layer, lock and hide the previousone. Name it as Exercise 2, and select the drawing tool of horizontal and vertical line. you should use the command line to place it, ajust the length and the snap point.

Horizontal line with origin (30, 50) and 60mm pointing to the right.

Vertical line with origin (45, 55) and 40mm upwards.

Horizontal line with origin (20, 80) and 50mm pointing to the left.

Vertical line with origin (30, 110) and 70 mm downwards.

Drawing Poligons

Exercise 3:

Draw an equilateral triangle of 65mm side. different tools can be used. Drawing poligons, choose the number of sides and especify the position. Also can be drawn by angle lines. Remember use a new layer

Snap tools.

Exercise 4:

Create a new layer and draw one square of any size with the tool drawing poligon of 4 sides and draw another inside starting from the midpoints of each side. Make successive figures to achieve an effect similar to the one shown. (Force to midpoint)

Parallels.

Exercise 5:

In a new layer draw a square of 56 x 56 mm you can choose the easier way by vertical horizontal lines or poligons. Then draw horizontal and vertical parallels to its sides at a distance of 14 mm. Finally, join the diagonals of the squares small using the option to force intersection. (Force intersection)

Including Dimensions.

Exercise6:

Draw these figures and dimension them in the correct way including a new layer in different colour.

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