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symmetries

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Symmetries of a polyhedron 2009-03-02
Vincent pose la question :
I want to ask is there a formula to find out the number of axes of rotation & plane of reflection of a 3D figure, like pentagon, pyramid?
Chris Fisher lui répond.
Symmetries of a parallelogram 2008-11-24
anisha pose la question :
how many lines of symmetry does a parallelogram have. A square and a rect are a parallelogram too. so it is confusing?? pls help
Walter Whiteley lui répond.
Symmetries of a rhombus 2003-11-02
Tonia pose la question :
why cant an equal sided rhombus have 3 lines of symmetry? you have one line of symmetry on each of the diagonals, and there should be one vertically on an angle. can you please explain the rules of symmetry to me?
Walter Whiteley lui répond.
 
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