Any shapes that have seven sides.
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Many shapes can make up a heptagon, as long as there are always seven sides. (They do not have to be of equal length.)
Any plane figure with seven sides is a heptagon.If all the sides are equal, and all the angles are equal, it is a regular heptagon.
No but a regular heptagon must have equal sides.
7 sided polygon
Most heptagon shapes add up to 360 degrees.