A pyramid
triangular prism
a triangular prism.
A triangular pyramid.
triangular prism
Trapezium, or triangular pyramid * * * * * A triangular pyramid, yes. But not a trapezium since that does not have four triangular faces.
Well, a triangular prism has 5 faces and 6 vertices, but it has 9 edges. So I'm not sure.
A cone
Triangular prism
a cylinder a cylinder
pentagonal pyramid
There is no specific name because there any several possible configurations.
1. triangular prism it has 2 triangular faces. 2.triangular base pyramid, it has 5 triangular faces. 3. square base pyramid, it has 4 triangular faces.