heptahedron
Pentagonal prism.
A hexagon based pyramid.
A hexagon based pyramid.
A right pentagonal prism.
A 3D pentagon itself does not exist as a standalone shape, as a pentagon is a 2D figure with five sides. However, if you're referring to a 3D shape that is based on a pentagon, such as a pentagonal prism or a pentagonal bipyramid, the number of faces would vary. A pentagonal prism has 7 faces (2 pentagonal bases and 5 rectangular lateral faces), while a pentagonal bipyramid has 7 triangular faces.
A Pyramid is a 7 lettered 3D shape with triangular faces.
heptahedron
Pentagonal prism.
a square
A hexagon based pyramid.
A hexagon based pyramid.
It cannot be a simply connected 3d shape because it does not satisfy the Euler characteristic.
A right pentagonal prism.
A 3D pentagon itself does not exist as a standalone shape, as a pentagon is a 2D figure with five sides. However, if you're referring to a 3D shape that is based on a pentagon, such as a pentagonal prism or a pentagonal bipyramid, the number of faces would vary. A pentagonal prism has 7 faces (2 pentagonal bases and 5 rectangular lateral faces), while a pentagonal bipyramid has 7 triangular faces.
heptahedron
The 7-letter word for a 3D shape with triangular faces is "pyramid." A pyramid is a polyhedron with a polygonal base and triangular faces that meet at a common vertex called the apex. Pyramids are classified based on the shape of their base, such as square pyramids, triangular pyramids, pentagonal pyramids, etc.
A polyhedron is a solid figure with many plane faces, usually greater than six. A polyhedron that has 7 faces is called a heptahedron.