# Symmetry Year 3 & 4

Symmetry Year 3 & 4 KS2. Maths homework help with rotational symmetry and completing symmetry drawings.

## Rotational symmetry

When a shape has rotational symmetry it means that you can turn it to fit into itself. The point on where the shape turns around is the centre of rotational symmetry. The order of rotational symmetry is the number of times that it fits into itself when it's turned 360˚.

Watch up to 2:36

## Shape Symmetry

Different shapes have a different amount of order of rotational symmetry.

Here is a list of common shapes and how many order of rotational symmetry they have.

##### Square

4 lines of symmetry
4 order of rotational symmetry

##### Rectangles

5 lines of symmetry
1 order of rotational symmetry

##### Isosceles Triangle

1 lines of symmetry
1 order of rotational symmetry

##### Equilateral Triangle

3 lines of symmetry
3 order of rotational symmetry

##### Circle

Infinite lines of symmetry
Infinite order of rotational symmetry

##### Ellipse

2 lines of symmetry
2 order of rotational symmetry

##### Rhombus

2 lines of symmetry
2 order of rotational symmetry

##### Trapezium

4 lines of symmetry
4 order of rotational symmetry

##### Pentagon

5 lines of symmetry
1 order of rotational symmetry

##### Hexagon

6 lines of symmetry
6 order of rotational symmetry

##### Octagon

8 lines of symmetry
8 order of rotational symmetry

## Drawing reflections

When drawing a reflection remember that the object is flipped.

• Start by marking the points of the object by counting how far away they are from the mirror line.
• Join up the dots to make the image.
Symmetry Shapes
Create the pattern in symmetry. Try horizontal lines, vertical lines and diagonal lines.