Groups of symmetry of rectangle

shahar said:
What are the eight groups of symmetry of rectangle?
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Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem
 
shahar said:
I can't see some of the groups of symmetry in rectangle. That the problem!
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As I hinted at in post # 3, you are looking for four too many groups of symmetry.
I went to two Internet sites to remind me that there are four, not eight, groups of
symmetry for general rectangles.
 
If you tell us the ones you do see, then we can help you find the ones you don't see.
 
shahar said:
What are the eight groups of symmetry of rectangle?
Click to expand...
Slightly more basic question: Are you looking for a group with 8 elements? Or several groups that you can use? I count 8 elements in the symmetry group for a rectangle.

-Dan
 
lookagain said:
I count 8 elements in the symmetry group for a rectangle.
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I looked at two Internet sites to try to match the four total I claim there are for a rectangle:

1)
identity

2)
180 degrees rotation

3)
vertical rotation

4)
horizontal rotation
 
Thanks. i will check the source and find where is the mistake?
 
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