Whiteboardmaths.com 7 2 1 5 © 2004 All rights reserved One Line of Symmetry Vertical lines of symmetry Horizontal lines of symmetry Diagonal lines of symmetry 1 LoS 2 Lines of Symmetry 2 LoS The Rectangle Problem Rectangle A rectangle has only 2 lines of symmetry and not 4 like the square To see this consider the following: Half a rectangle Mirror Line The Rectangle Problem A rectangle has only 2 lines of symmetry and not 4 like the square To see this consider the following: A reflection in the diagonal would produce a kite! Half a rectangle Mirror Line 3 LoS 3 Lines of Symmetry 4 LoS 4 Lines of Symmetry 5 Lines of Symmetry 5 LoS 6 LoS 6 Lines of Symmetry Regular Polygons Equilateral Triangle Square Regular Pentagon Regular polygons have lines of symmetry equal to the number of sides/angles that they possess. Regular Hexagon Regular Octagon Regular How many lines of symmetry for each shape? 4 3 6 Mix 1 5 8 How many lines of symmetry for each shape? 6 5 3 Mix 2 4 5 How many lines of symmetry for each shape? 2 2 5 3 Mix 3 4 How many lines of symmetry for each shape? Mix 4 6 2 1 2 4 1 How many lines of symmetry for each shape? 1 2 4 Mix 5 5 3 How many lines of symmetry for each shape? 8 4 6 1 1 Mix 6 And a big thankyou to all our friends! Reflections Reflect the object shape in the mirror line shown. Trace the shape and mirror line using tracing paper. object Turn tracing paper over and match up mirror lines. Mirror Line Tracing 1 Reflections Reflect the shape in the mirror line shown. Trace the shape and mirror line using tracing paper. object Turn tracing paper over and match up mirror lines. Mark position of vertices, remove tracing paper and draw image of shape. Mirror Line Reflections Reflect the shape in the mirror line shown. object image Trace the shape and mirror line using tracing paper. Turn tracing paper over and match up mirror lines. Mark position of vertices, remove tracing paper and draw image of shape. Mirror Line Reflections Reflect the object shape in the mirror line shown. object Trace the shape and mirror line using tracing paper. Turn tracing paper over and match up mirror lines. Mirror Line Tracing 2 Reflections Reflect the object shape in the mirror line shown. object Trace the shape and mirror line using tracing paper. Turn tracing paper over and match up mirror lines. Mark position of vertices, remove tracing paper and draw image of shape. Mirror Line Reflections object image Reflect the object shape in the mirror line shown. Trace the shape and mirror line using tracing paper. Turn tracing paper over and match up mirror lines. Mark position of vertices, remove tracing paper and draw image of shape. Mirror Line Reflections object Reflect the object shape in the mirror line shown. Trace the shape and mirror line using tracing paper. Turn tracing paper over and match up mirror lines/square corners. Mirror Line Tracing 3 Reflections object Reflect the object shape in the mirror line shown. Trace the shape and mirror line using tracing paper. Turn tracing paper over and match up mirror lines/square corners. Mark position of vertices, remove tracing paper and draw image of shape. Mirror Line Reflections Reflect the object shape in the mirror line shown. object image Trace the shape and mirror line using tracing paper. Turn tracing paper over and match up mirror lines/square corners. Mark position of vertices, remove tracing paper and draw image of shape. Mirror Line WS 1 WS 2 Ws 3 WS 4 WS 5 WS 6 How many lines of symmetry for each shape? 4 3 6 Mix 1a 5 8 How many lines of symmetry for each shape? 6 5 3 Mix 2a 4 5 How many lines of symmetry for each shape? 2 2 5 3 Mix 3a 4 How many lines of symmetry for each shape? Mix 4a 6 1 2 2 4 1 How many lines of symmetry for each shape? 1 2 4 Mix 5a 5 3 How many lines of symmetry for each shape? 8 4 6 1 1 Mix 6a Reflections Tracing 1a Reflections Tracing 2a Reflections Tracing 3a