An orb - Globe - ball
It is a face.
Cone
A rectangular-based pyramid.
A Pyramid
The shape described is a triangular prism.
Any one of the plain surfaces of a solid, three-dimensional shape. Also Called -- side
A dodecagon is a two-dimensional shape and so has only one face.
Square
sphere
A cone perhaps
A triangle has three faces. In geometry, a face refers to a flat surface of a solid shape. Since a triangle is a two-dimensional shape with three sides, it has three faces. Each side of the triangle forms one of its three faces.
It could be a semi-sphere but mostly it's a cone.