A shape's sides are called faces.
Chat with our AI personalities
A seven sided shape is called a heptagon or a septagon.......
It's called a side or edge.
A one sided shape (ignoring the poor grammar) is a line. Is that what you wanted?
A seven or 7 sided polygon shape is called a Heptagon(hep-ta-gone).
Any plane shape on the side of a polyhedron is called a face.