Octahedron.
octahedron - a polyhedron with 8 faces
An octahedron has 8 sides.An octahedron is a polyhedron with eight plane faces.
Equilateral triangles
Area of equilateral triangle: 0.5*8*8*sin(60 degrees) = 27.7 square inches rounded
Not any simply connected 3-dimensional polyhedron.
The answer is a polyhedron
octahedron
diamond/octahedron
an octahedron
a regular octahedron
Octohedron, or rhomboid.
octahedron
A regular octahedron.
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A regular octahedron or a square based dipyramid.
yes
A heptagonal pyramid and a square based dipyramid are two possibilities. There are others.