A triangle is not a polyhedron. A triangle is a two-dimensional figure, and a polyhedron is a three-dimensional solid. An example of a triangular-shaped polyhedron is a pyramid.
Octahedron.
Octogon
Yes it is a tetrahedron
Tetrahedron - a pyramid with a triangular base.
Short answer: there isn't one. The polyhedron with the smallest number of faces (which is probably what you mean) is the tetrahedron, which has four faces.Maybe you meant polygon, in which case the answer is a triangle.
The answer is a polyhedron
square and hexagon
it is a triangle prism
Yes
Tetrahedron
pyramid
Octahedron.
Tetrahedron
There are many possible answers.
It is a tetrahedron = a triangle based pyramid.
yes it is called a octahedron
if you mean common: one of the triangle, square, and pentagon vertion of pyramid, dipyramid, and gyrolongated dipyramid. a total of 9.