You could take any of the sides of a heptagon and make them into a non linear curve, and that would not be a heptagon.
or, three dimensionally, if you cut one of the corners off a cube, that would also have 7 sides, but it would not be a plane figure.
It has 7 sides
A heptagon sometimes known as a septagon has 7 sides
A heptagon with anything other than 7 sides is not an heptagon!
A heptagon has 7 sides and 7 vertices.
A septagon or a heptagon both have 7 sides
It has 7 sides
A heptagon sometimes known as a septagon has 7 sides
A heptagon with anything other than 7 sides is not an heptagon!
A heptagon has 7 sides and 7 vertices.
A septagon or a heptagon both have 7 sides
A heptagon has 7 sides and 7 internal angles. It also has 7 external angles. A regular heptagon has 7 equal sides
a heptagon
A Heptagon has seven sides.
A heptagon has 7 sides.
A regular heptagon has seven sides.
a heptagon has 7 sides
A heptagon has 7 sides and 7 vertices.