Its called an octahedron. See the related link for more information
A triangular pyramid.
A seven sided object is called a septagon and the angles add up to 900 degres
A 100-sided polygon is called a hectogon.
it is called an icosagon
It is called a hexagon.
Its called a pentahedron. Its a five sided or faceted polygon.
A triangular pyramid.
A triangular dipyramid.
A five sided 3d shape is called a pentehedron
Five sided shape = pentagon
Its called the triastermede. Hope this helps!
A triangular pyramid.
a triangular prism
A triangular pyramid A triangular pyramid has four sides - each of which is a triangle. There cannot be a three sided pyramid. If you mean a 3 sided Pyramid with its base being the forth side it would be a Quadrangle. A four-sided triangular solid is also called a tetrahedron, and two interlaced are called a Star Tetrahedron.
What is a 12 sided object called?A twelve sided object is called a dodecagon. I'm glad I could help. =)
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
Triangular Pyramid.