No rotational Symmetry Order 4 Order 3 Order

No rotational Symmetry Order 4 Order 3 Order 2

Order 5 Order 3 Order 8 Order 5

Order 5 Order 6 Order 3 No rotational Symmetry

We say a shape has ROTATIONAL SYMMETRY if it fits exactly into itself (looks exactly THE SAME) when it is rotated. TOP How many times does this shape fit into We say it has rotational symmetry of order 4 itself?

A shape may have NO Rotational Symmetry A shape is said to have NO Rotational Symmetry If it fits onto itself only ONE TIME

The ORDER of Rotational Symmetry • The order of rotational symmetry of a shape is determined by how many times the shape fits onto itself during a 360° turn.

L. O. To be able to find the order of rotational symmetry of a given shape

Equilateral Triangle An equilateral triangle has rotational symmetry of order 3? 3 2 1

Square A square has rotational symmetry of order ? Square

Square A square has rotational symmetry of order ?

Square ? A square has rotational symmetry of order 4 3 4 2 1

Regular Pentagon A regular pentagon has rotational symmetry of order ?

Regular Pentagon A regular pentagon has rotational symmetry of order 5 ? 5 4 1 3 2

Regular Hexagon A regular hexagon has rotational symmetry of order ? Hexagon

Regular Hexagon A regular hexagon has rotational symmetry of order ?

Regular Hexagon A regular hexagon has rotational symmetry of order ? 5 6 1 4 3 2 6

Regular Polygons What did we say a Regular Polygon is? A regular polygon is a shape which has: • All sides equal • All angles equal Examples ? What did we say about lines of symmetry in regular polygons? Regular polygons have lines of symmetry equal to the number of sides/angles that they have

What can we also conclude? Regular polygons have order of rotational symmetry equal to the number of sides/angles that they have. For REGULAR POLYGONS No. of sides No. of angles Lines of symmetr y Order

Rectangle A rectangle has rotational symmetry of order ? Rectangle

Rectangle A rectangle has rotational symmetry of order ? 2 1 2

What is the order of rotational symmetry? answer

What is the order of rotational symmetry? answer

Isosceles Triangle An isosceles triangle has rotational symmetry of order ? Isos Tri

Isosceles Triangle An isosceles triangle has rotational symmetry of order ? 1 Isos Tri No rotational Symmetry

Scalene Triangle An scalene triangle has rotational symmetry of order ? Scalene Tri

Scalene Triangle An scalene triangle has rotational symmetry of order ? 1 No rotational Symmetry

Isosceles Trapezium An isosceles trapezium has rotational symmetry of order ? Isos Trapezium

Isosceles Trapezium An isosceles trapezium has rotational symmetry of order ? 1 No rotational Symmetry

Trapezium A trapezium has rotational symmetry of order ? Trapezium

Trapezium A trapezium has rotational symmetry of order ? 1 No rotational Symmetry

Rhombus A rhombus has rotational symmetry of order ? 2 2 1

Kite A kite has rotational symmetry of order ? Kite

Kite A kite has rotational symmetry of order ? 1 No rotational Symmetry

How do we feel about the SYMMETRY TOPIC? • Go over Power. Points making sure you feel confident in both line symmetry and rotational symmetry • It’s the end of symmetry topic