This question is faulty. Only 2-dimensional shapes can have their sides counted. For a 3-dimensional shape, you must count either edges or faces.
A pyramid
'Object' Do you mean 'shape' or 'solid'. a 2-dimensional shape is an hexagon a 3-dimensional solid is a hexahedron.
a triangle
vessel
Triacontatetragon. Most mathematicians would call it a "34-gon."
you call a seven sided shape a heptagon.
A shape that has 10 sides (two dimensional) is called a decagon. A shape that has 10 faces (three dimensional) is call a decahedron.
An 11 sided shape is an Eptogon
When two sides (called faces) of a 3-dimensional shape meet, they meet at an edge.
Watson and Crick called the three-dimensional shape of DNA a double helix. They discovered the structure of DNA in 1953.
A right pentagonal prism.
A 30 sided shape is called a Triacontagon.