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It can but it need not.
It has 5 sides It has 5 angles The sum of the interior angles is 540° All angles are not the same measure The sides may, or may not, all be the same length. It will not have line symmetry of 5 It has no rotational symmetry (called rotational symmetry of 1 when I was at school).
YES!!! THere are five lines of symmetry. From any one point to the centre of opposite side. If drawn accurately all five lines should pass through the centre.
a pentagon has 5 lines of symmetry
A general pentagon may have no symmetries at all. A regular pentagon has five symmetry axes - each one connecting a vertex with the middle of the edge opposite this vertex. A regular pentagon also has rotational symmetry - if you rotate it by any multiple of 72 degrees clockwise or anti-clockwise you get a regular pentagon as well. Please also see the related link below.