That's impossible, because if a shape has sides, then it means it has corners, and vice versa.
A penagon is a shape with five sides and five corners.
This shape has ten sides
There is no such shape. If it has two sides meeting, it also has to have a corner. A triangle has three sides and three corners, and a square has four sides and four corners. There is nothing in between.
No such shape exists.
An heptagon has 7 corners and 7 sides whereas an octagon has 8 corners and 8 sides
8 sides, or corners? 8 corners would be a cube. A cube has six sides, though.
Octagon
Even assuming that conners refers to corners, there is no normal shape that has these properties.
No shape can have two corners
A shape with eight sides is always an octagon. If all angles and sides are equal, it is called a regular octagon.
a heptagon has 7 corners and a octagon has 8 corners .
That's impossible, because if a shape has sides, then it means it has corners, and vice versa.
A penagon is a shape with five sides and five corners.
Dodecagon...it has 12 sides and 12 corners.
This shape has ten sides
Hexagon has 6 sides and 6 corners.