5
No.
triangle... because pyramids are triangular therefore triangular pyramids have triangle faces
tetrahedron
The answer is a polyhedron
There are 2 triangle base faces, and 3 rectangle faces. 5 total faces.
four triangle faces.
5 faces
1
5
No.
A triangle has 3 sides and 3 vertices. Strictly speaking, the interior of the triangle is not part of the triangle so it has no faces. However, a triangular lamina will have two faces - one from above and one from below.
Five faces and nine edges
a 2d triangle has 1 face known as a plane but a triangular prism has 4 faces
triangle... because pyramids are triangular therefore triangular pyramids have triangle faces
tetrahedron
Five faces on a square based pyramid. Never heard of a square based triangle.