a) Which of these pictures are symmetrical? b) How many lines of symmetry can you fi nd on each?
Remember: a shape has line symmetry if it can be folded along a line so that each half fi ts exactly onto the other. Shapes which have lines or axes of symmetry are called symmetrical shapes.
2. Draw and cut out each of the following 2-D shapes: square
equilateral triangle
rectangle trapezium
rhombus
pentagon
a) How many different ways can you fold each shape evenly in half? b) Draw the shape into your copy and draw dotted lines where it has been folded. c) Record your results on a table like this.
Shape square
Number of sides
Number of angles
3. Which of these numbers are symmetrical? 1 5 3 8 7 2 0
4. a) The number 1001 is symmetrical. How many lines of symmetry does it have? b) Can you think of other numbers that are symmetrical?