Page 10 - ENGINEERING DRAWING

3

5. Set square

Set squares are used in conjunction with T squares to create vertical lines and inclined lines.
o.
o
o
o
The constructed line is at an angle of 30 , 45 , 60 and 90 .

6. Protactor

Protactor is used to draw and measure the angles of lines in the drawing. It is transparent
and made of plastic. It is in the shape of the semi-circle, and the edge of the semi-circle part
consists of reading with one-degree accuracy.

7. French curve

French curve is used to draw a line of the curve that cannot be used with a compass.