HOW TO DRAW STRAIGHT LINES

• DRAWING PARALLEL LINES

These lines never cross.

1.  Draw a straight line.
2. Put the hypotenuse of the isosceles set square on the line.
3. Put the scalene set square on the other side.
4. Hold the scalene set square in the place and move the isosceles set square up or down to draw a paralell line.

• DRAWING PERPENDICULAR LINES

These lines touch and make an angle of 90º.

1. Draw a straight line.
2. Put the set squares in the same position as for parallel lines.
3. Turn the isosceles set square round and draw another line perpendicular to the first line.

• HOW TO DRAW ANGLES

We can use set squares to make angles of 15º, 30º, 45º, 60º, 75º, 90º ... in fact any multiple of 15.

1. We can draw 30º, 45º, 60º y 90º angles directly.
2. To draw a 15º angle, first draw a 45º angle with the isosceles set square. Then place the scalene set square on the new line and draw a 30º angle. The new angle will be 15º (45º - 30º).

• USING A PROTRACTOR

1. Draw a line.
2. Put the protractor on the line with the end of the line at the centre of the protractor.(A)
3. Choose the angle you want and put a dot next to the number. (B)
4. With a ruler, draw a line connecting A to B.