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.
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
Triangle
A pyramid.