Answer is Triangular Pyramid.
What is Triangular Pyramid:
Triangular pyramid is a 3D shape in which all the faces are triangles. It is a pyramid with a triangular base connected by four triangular faces where 3 faces meet at one vertex. If it is a right triangular pyramid, the base is a right-angled triangle while the other faces are isosceles triangles.
(Here),
When you fold the given diagram you will get triangular pyramid.
Learn more about Triangular pyramid here:
https://brainly.com/question/24046619?referrer=searchResults
#SPJ2