A pyramid
A square based pyramid
Pyramid
i don't know that's why i asked! duhhh
A prism is a 3-dimensional figure, which has a volume, so I presume you mean surface area. The simple answer is you find the area of each face (both pentagons and all 5 parallelograms), and then add them together. If you don't know how to find the area of one or more of the faces, that is a separate question.
-5
A square based pyramid.
A pyramid
A triangular prism.
A pyramid with a square base.
5
-5
Despite the blind answer of many uneducated users of this site, a pentagon is 2 dimensional with 5 SIDES, thus not a solid figure. A pentahedron, though, is a solid figure of five FACES. PENTAHEDRON
Triangular Prism Triangular Prism 5 faces, 9 edges 6 vertices
a triangular prism
10 vertices
A square based pyramid would fit the given description