Question

A tipi is a portable structure made of poles and covered in hides. Native American tipis varied in size and the number of poles used. A 12-pole tipi framework is shown in the following figure. The framework of a tipi lean toward the west so the apex was not centered above the floor. Name the polyhedron formed by the framework of poles and the ground and give the number of faces, edges, and vertices. Does Euler’s formula hold for Native American tipis?

Answer 1

it's just a pyramid.
And, of course Euler's formula holds.