Which shape will we get as the cross-section when a sphere is cut vertically by a plane?

Which three-dimensional shape will we get by folding the given net?

Tanya wrote a riddle for her friends:

I am a three-dimensional object. I have four triangular faces, six edges, and four vertices.

Who am I?

The answer to the riddle is _____.

In the shape given below, which of the following relations holds true:

$V$ means number of vertices.

$E$ means number of edges.

$F$ stands for number of faces.