tetrahedron
Triangular Prism
A triangle with an approximately spherical shape on top, is one possibility.
If the triangles are congruent then it is a triangular-based prism.
A triangle has three faces. In geometry, a face refers to a flat surface of a solid shape. Since a triangle is a two-dimensional shape with three sides, it has three faces. Each side of the triangle forms one of its three faces.
Pyramid
Triangle
A 3D shape with one base and three faces can only have triangular faces.
most likely a triangular prism
a triangle duh. one in middle and the same going all around the shape and add them up and you get 3! (>'-')>(>'-')>(>'-')>(>'-')>(>'-')> its a Kirby kongo line! lol. haha! its awesome isn't it!? no sry that is wrong once again
The answer is a polyhedron
Octohedron