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An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. An octahedron can have triangles for all eight faces or, as is the case with a hexagonal prism, not a single triangular face.
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What is the name of dome made up of triangles and polygons?
geodesic
What is a polygon that is made up of 22 triangles?
Assuming ALL 22 triangles are congruent, this would be a 22-gon, also known as an icositedigon
What kind of triangles make up a pyramid?
Many different types, but mostly equilateral triangles.
How many triangles make up an octagon?
Eight triangles of equal size form a regular octagon.
How many triangles make up the shape of a pyramid?
There are 4 triangles that make up a pyramid. 4 on the sides and on the bottom a square or rectangle.
How many triangles does mystic hexagon have?
An hexagon is made up out of 4 triangles
Can anyone give a brief explanation of the Five Platonic Solids?
The 5 are: the tetrahedron, made up of four triangles the hexahedron, made up of 6 squares (this solid is also known as the cube) the octahedron, made up of 8 triangles the dodecahedron, made up of 12 pentagons the icosahedron, made up of 20 triangles at each vertex on these solids, there are an equal number of faces meeting they are all regular polyhedra for each solid, the angles and sides are congruent and if it wasn't obvious already, they were discovered by Plato anything else?
How many triangles in a triangle made up of 16 small triangles?
27, but you will have to prove it.
What does an octahedron look like?
An octahedron is a polyhedron with eight faces. A regular octahedron can be composed of eight equilateral triangles, four forming each half, and meeting in the middle at a square. Imagine a pyramid, with a square base. Rising up from each edge is an equilateral triangle that meets the other four triangles at the apex. Now, turn the pyramid over and add four more triangles to the other side the same way. You now have an octahedron. For more information, and a rotating picture, please see the related link below.
How many triangles does a octagan have?
An octagon is made up from six triangles each containing 180 degrees.
How many diagonals does a regular octagon have?
It has 20 diagonals and is made up by 6 triangles
What are the 5 basic polyhedrons?
Tetrahedron (4 triangles, like a pyramid design with a triangular base) Cube Octahedron (8 triangles - like two pyramids stuck together at the base, one going up and one going down) Icosahedron (20 triangles) Dodecahedron (12 pentagons)
Are pyramids made up from equilateral triangles?
The Great Pyramids at Giza are, but the Meso-Americans were truncated.
What is the strongest type of dome?
A geodesic dome is made up of many triangles and very strong.
Why is an octahedron an antiprism?
An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. All but one are not antiprisms: only the regular octahedron is.An antiprism is a solid shape comprising two identical parallel faces joined together with a "ring" of triangles alternately pointing in opposite directions. Consider a regular octahedron placed on one of its faces - a triangle. Its top face will be another identical triangle which points in the opposite direction. Between the top and bottom, there are six triangles, alternately pointing up and down. It therefore meets all the requirements of an antiprism.
How many triangles in an decagon?
A decagon can have eight or more triangles - up to infinitely many.
How many triangles in a icosihenagon?
27 triangles make up an Icosihenagon
