A shape with sides of equal length is referred to as REGULAR. This has 7 letters.
it has 7 letters
rhombus and squuare Although not a shape, in itself, the 7-letter adjective REGULAR means the shape has equal sides (and equal angles).
A shape with 7 sides.
A shape with 7 sides is a heptagon
a heptogon has 7 sides
A heptagon has 7 sides.
A rhombus, which unlike a square, does not have to have all four ninety degree angles.
7 sides heptagon 9 sides nonagon