A pyramid.
The description given could fit that of a pyramid
3. You wanna know how?? First there are 3 triangles that touch the base, so there are only 3 lateral faces. :)
it is a pyramid
Not true. They have only one base and several (3 or more) lateral triangular faces. A pyramid has a single vertex over a base - there are no parallel faces in any pyramid.
A 3D shape with one base and three faces can only have triangular faces.
There would be one face for each side of the square. The answer is four if you or only counting the triangular faces. It would be five if you are including the square base. * * * * * One square base and four triangular faces (that meet at an apex above the base).
There would be one face for each side of the square. The answer is four if you or only counting the triangular faces. It would be five if you are including the square base. * * * * * One square base and four triangular faces (that meet at an apex above the base).
A shape with 5 sides is a pentagon.However, the term face is only applied to three-dimensional forms,and a shape (solid) with 5 faces is a pentahedron.There are no regular pentahedrons. The two forms are the square pyramid and the triangular prism. The former has 4 triangular sides and a square or rectangular base; the latter has 3 rectangular (or square) faces and two triangular ends.
There are an infinite no of shapes that have exactly 4 triangular faces. The two commonest are a tetrahedron and an Egyptian pyramid. If the question is re-phrased to "What shape has exactly four faces, (all of which are triangular), then the only answer is a tetrahedron. An Egyptian pyramid has five faces - a square base and four triangular sides. It is regular (the apex is vertically above the center of the base) and the sides are isosceles.
That could be a triangular pyramid.
triangular cone
Any face of a tetrahedron can be considered a base. A pyramid, in general, has one polygonal face (with n sides) and n triangular faces. In such a pyramid, the triangular faces would normally not be considered bases - only the n-gon would.