Looking Back

The line which divides a figure into two parts is called the 1ine of symmetry or of symmetry.

An object cancan't have one or more than one lines of symmetry or axes of symmetry.

If we rotate a figure, about a fixed point by a certain angle and the figure looks exactly the same as before, we say that the figure has symmetry.

The angle of turning during rotation is called the angle of .

All figures have rotational symmetry of order , as can be rotated completely through ° to come back to their original position. So we say that an object has rotational symmetry only when the order of symmetry is more than 1less than 1.

Some shapes only have line symmetry and some have only rotational symmetry and some have both. Squares, equilateral triangles and circles have both line and rotational symmetry.