The base being a plain figure will be an HEPTAGON.
However, with the seven triangular faces ( to the point), plus the base, there are eight faces. So as a solid object it will be an irregular octahedron.
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A pyramid with seven sides has 12 edges. A pyramid based on a seven-sided base has 14 edges.
A hexagonal pyramid has 7 faces, including the hexagonal base and 6 triangular faces. It has 12 edges, with 6 along the base and 6 connecting the base to the apex. Lastly, it has 7 vertices, with one at the apex, 6 along the base, and one where an edge meets the apex.
it is called a seven sided shape in Canada
A 7-sided polygon is called a heptagon. The word derived from Greek. If it derived from Latin it might be called a septagon, but that is not the case.
heptagon