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please explain why does a parallelogram has zero lines of symmetry ?

Dear student
When a geometric figure is folded about a line of symmetry, the two halves match up so when parallelogram is folded it have no line of symmetry.
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it is a twisted form of rectangle and doesn't have lines of symmetry. there is no specific reason for which parallelogram have no lines of symmetry. it can be observed practically
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it is a twisted form of rectangle and doesn't have lines of symmetry. there is no specific reason for which parallelogram have no lines of symmetry. it can be observed practically
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it is a curved form of rectangle.no specific reason for not having lines of symmetry .it is a practical observation.
 
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AS THE PARALLELOGRAM IS VERY DIFFERENT THAN THE OTHER QUADRILATERALS 
WHEN YOU DIVIDE IT FROM ANY SIDE AND KEEP THE PIECES ON EACH OTHER, THEY DON'T COVER THEM PROPERLY.

YOU CAN DO IT PRACTICALLY FROM PROVING IT!!
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good
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