It will look like a 2D equilateral triangle if it is a triangular based pyramid which is called a tetrahedron.
Net of the Triangular Prism
Four.
There is only one net to a triangular pyramid.
A net for a triangular pyramid is made out of 4 triangles. A net for a triangular prism is made out of 3 rectangles and 2 triangles.
base is triangular
Triangular prism: 2 triangles, 3 rectangles Triangular pyramid: 4 triangles.
Net of the Triangular Prism
Tow triangles and three rectangles.
A triangle and a square
a triangular pyramid
4 triangle surfaces