Page 63 - Key Stage 3 Geometry

To indicate parallel lines on a

quadrilateral certain arrow
marks are used as indicated

in the figure on the left. The

lines with single arrows are parallel and the sides with
double arrows are parallel.

Exercise 4.2

Drawing a concave quadrilateral.

1. On a sheet of A4 paper, using your ruler mark

two horizontal dots 10 cm apart.
2. Set your compasses with a separation of 5 cm,

place the point on the left dot and draw an arc.
3. Place the compasses point on the right-hand dot

and draw a touching arc.

4. Place the compasses point where the two arcs
touch and draw an arc vertically above this

point.

5. Increase the separation of your compasses to
6.5 cm.

6. Place the compasses point on right dot and draw

a horizontal arc.

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