An eleven sided polygon is a hendecagon.
Sometimes also called an undecagon
Any shape with straight edges can have perpendicular edges.
a circleA pedantic edit:Also an ellipse or a wriggly loop.Any shape that has no straight edges is described as a curvilinear shape.
Every shape that is round does not have edges. A shape that has sharp points and has straight lines can have edges.
Overall
An ellipse is a shape that could be described as looking like 'a squashed circle.' With no straight edges, this shape is also called an oval.
An Octagon
A pentagon
hexagon
octagon !
hexagon
Polyhedra.
A triangular pyramid has 6 edges.