heptahedron
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Pentagonal prism.
A hexagon based pyramid.
A hexagon based pyramid.
A right pentagonal prism.
heptahedron
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.
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.
You can have a 3d shape with any no of sides 3d only means there are three measure needed to calculate volume, or in other words you can pick it up and touch it. These three measurements are width, depth and height. If the faces all had to be of the same area and flat there might not be a 7 sided 3d shape (or a regular one at least) there can always be a n-sided non-irregular shape even a 1,253,703-sided irregular shape is theoretically possible.