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Rotational SymmetryAll 2 dimensional shapes have some rotational symmetry. The degree of rotational symmetry that an object has is known as its order.
Order 1 Order 2 Order 3 Order 4
For shapes that have “order 2” rotational symmetry or higher, a single centre of rotation can be located.
For shapes that have only “order 1” rotational symmetry a centre of rotation can be found anywhere within it.
Rotational Symmetry
The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 3600
Order 1
Rotational Symmetry
Order 11
2
Order 2
The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 3600
Rotational Symmetry
Order 11
2
Order 2
12
3
Order 3
The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 3600
Rotational Symmetry
Order 11
2
Order 2
12
3
Order 312
3 4
Order 4
The order of rotational symmetry that an object has is the number of times that it fits on to itself during a full rotation of 3600 .
1
2
3
4
5
What is the order of rotational symmetry of the shape below?
Order 6
Rotational Symmetry
6
Rotational SymmetryState the order of rotational symmetry for each shape below:
1 2 3 4
5 6 7 8
9 10 11 12
Order 6 Order 2 Order 3 Order 2
Order 1 Order 3 Order 2 Order 5
Order 4 Order 1 Order 6 Order 8
Rotational SymmetryState the order of rotational symmetry for each shape below:
13 14 15 16
17 18 19 20
21 22 23 24
Order 4 Order 1 Order 2 Order 5
Order 2 Order 4 Order 6 Order 3
Order 5 Order 4 Order 3 Order 1
Now..it’s the time for…Now..it’s the time for…
To ignite your minds..To ignite your minds..To ignite your minds..To ignite your minds..
@ First, Observe the given Picture carefully.
@ Try to Imagine the rotation
@ Concentrate on the inner designs also
@ Each question carries ‘1m’ as usual
@ Time limit for each Work sheet is ‘5 min.,’ only
# WRITE ONLY THE ORDER OF ROTATIONAL SYMMETRY IN THE GIVEN BOXES
Worksheet 1
Rotational SymmetryRotational SymmetryState the order of rotational symmetry for each shape below:
1 2 3 4
5 6 7 8
9 10
Worksheet 2
Rotational SymmetryRotational SymmetryState the order of rotational symmetry for each shape below:
13 14
15 16 17 18
19 20
11 12
Credits & Acknowledges !Credits & Acknowledges !
• The master trainer. Mr. N. Uma Srinivas• MS Office• MS Encarta• www.whiteboardmath.com• www.teachingideas.com• www.pppst.com• Perspector panel• VIPS Knowledge Centre.