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 pentagon
Its called a pentahedron. Its a five sided or faceted polygon.
A triangular pyramid.
A triangular dipyramid.
Five sided shape = pentagon
A three-sided pyramid is called a triangular pyramid or a tetrahedron. It has four faces, with three being triangular faces and one being a triangular base.
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.
a 4 sided 3d shape is called a triangular prism!!!!!!!!!!!!!!!
A six-sided object is called a hexagon.
20 faceted (regular) polyhedron is a icosahedron - all facets have equal size. There are variations which have more specific names (where certain facets have irregular shapes) An interesting site to look at is polyhedra.org which shows 6 other variations of 20 faceted polyhedrons: 1. gyroelongated triangular cupola 2. parabiaugmented dodecahedron 3. metabiaugmented dodecahedron 4.triangular hebesphenorotunda 5.gyroelongated triangular cupola 6. elongated triangular orthobicupola
What is a 12 sided object called?A twelve sided object is called a dodecagon. I'm glad I could help. =)