Equal sided = equilateral.
There are many such shapes and there is no specific name.
multi sided shapes are called polygons
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.
A heptagon or a septagon. Equal-sided shapes are called "regular" so a seven equal sides shape is a regular heptagon.square square
Hexagons.
Heptagon.
hexagon.
Hexagon
Polygons.
pentagons
3d shapes with six faces are called hexahedra.
They are called Quadrilaterals.