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Whiteboardmaths.com © 2004 All rights reserved 5 7 2 1.
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Transcript of Whiteboardmaths.com © 2004 All rights reserved 5 7 2 1.
Whiteboardmaths.comWhiteboardmaths.com
© 2004 All rights reserved
57 2
1
1 LoSOne Line of Symmetry
Vertical lines of symmetry
Horizontal lines of symmetry
Diagonal lines of symmetry
2 LoS
2 Lines of Symmetry
RectangleThe Rectangle Problem
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:
Half a rectangle
Mirror Line
A reflection in the diagonal would produce a kite!
3 LoS 3 Lines of Symmetry
4 LoS 4 Lines of Symmetry
5 LoS
5 Lines of Symmetry
6 LoS 6 Lines of Symmetry
Regular
Regular Polygons
Equilateral Triangle
Square Regular Pentagon
Regular Hexagon Regular Octagon
Regular polygons have lines of symmetry equal to the number of sides/angles that they possess.
Mix 1
How many lines of symmetry for each shape?
4 3 6
5 8
Mix 26 5 3
4 5
How many lines of symmetry for each shape?
Mix 32 5 3
2 4
How many lines of symmetry for each shape?
Mix 4
How many lines of symmetry for each shape?
6 2 4
1 2 1
Mix 5
How many lines of symmetry for each shape?
1 2 4
5 3
Mix 6
How many lines of symmetry for each shape?
4 8 1
6 1
And a big thankyou to all our friends!
Tracing 1
Reflections
object
Mirror Line
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.
object
Mirror Line
Reflect the shape in the mirror line shown.
Reflections
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
Reflect the shape in the mirror line shown.
Reflections
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.
object image
Tracing 2
Reflections
Mirror Line
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.
Reflections
Mirror Line
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.
Mark position of vertices, remove tracing paper and draw image of shape.
Reflections
Mirror Line
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.
Mark position of vertices, remove tracing paper and draw image of shape.
image
Tracing 3
Reflections
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
object
Reflections
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
object
Mark position of vertices, remove tracing paper and draw image of shape.
Reflections
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
object
image
Mark position of vertices, remove tracing paper and draw image of shape.
WS 1
WS 2
Ws 3
WS 4
WS 5
WS 6
Mix 1a
How many lines of symmetry for each shape?
4 3 6
5 8
Mix 2a6 5 3
4 5
How many lines of symmetry for each shape?
Mix 3a2 5 3
2 4
How many lines of symmetry for each shape?
Mix 4a
How many lines of symmetry for each shape?
6 2 4
1 2 1
Mix 5a
How many lines of symmetry for each shape?
1 2 4
5 3
Mix 6a
How many lines of symmetry for each shape?
4 8 1
6 1
Tracing 1a
Reflections
Tracing 2a
Reflections
Tracing 3a
Reflections