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A regularpentagon has 5 lines of symmetryAny pentagon could have less and so can have up to 5 lines of symmetry.
A right angle has one line of symmetry.
Each of the 6 interior angles is 120 degrees in a hexagon.
None.
Four * * * * * If the question refers to an octagon, rather than an octogan, it can have 8 lines of symmetry although it need not have any.