A regular octahedron is one of the platonic solids. Each of its faces is an equilateral triangle.
Start with an octahedron in the form of a quadrilateral based dipyramid a regular octahedron is a special case of this). This shape has six vertices - chop these off so as to remove a quadrilateral based pyramid. You will be left with a truncated octahedron. It is an octahedron which has been truncated (shortened) by cutting off its extremities.
A regular octahedron.
Many options. A pentagonal prism or a regular octahedron, for example.
Tetrahedron, Cube Octahedron Dodecahedron Icosahedron
A regular octahedron and a heptagonal pyramid.A regular octahedron and a heptagonal pyramid.A regular octahedron and a heptagonal pyramid.A regular octahedron and a heptagonal pyramid.
octahedron is a regular square bipyramid but a square bipyramid can be non-regular
In geometry, an octahedron is a polyhedron with eight sides. A regular octahedron is the dual polyhedron of a cube; It is a rectified tetrahedron.
The area of a regular octahedron with a side length of x is 2√3 * x²
8
Twelve.
A regular octahedron has 6 apexes as it can be rotated evenly as each face is congruent.
A regular octahedron is one of the platonic solids. Each of its faces is an equilateral triangle.
8
That would be a regular octahedron. See http://en.wikipedia.org/wiki/Octahedron
Start with an octahedron in the form of a quadrilateral based dipyramid a regular octahedron is a special case of this). This shape has six vertices - chop these off so as to remove a quadrilateral based pyramid. You will be left with a truncated octahedron. It is an octahedron which has been truncated (shortened) by cutting off its extremities.
A regular octahedron.