a triangular pyramid
a cylinder
A 1 dimensional shape is a line.
A right-angle triangle.
none unless u consider a circle has a face * * * * * In fact, any two dimensional closed figure: triangle, quadrilateral, other polygons, circle, ellipse, wriggly loop all have 1 flat face.
cone
A square pyramid
A cone.
a triangular pyramid
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.
a cylinder
A 1 dimensional shape is a line.
A right-angle triangle.
One possible answer is an infinite cone. Spheres have one face but no vertex. No physical 3-D shape can have a vertex without having more than one face (a real cone typically has two: side and bottom).
A triangle has three faces. In geometry, a face refers to a flat surface of a three-dimensional shape. Since a triangle is a two-dimensional shape with three sides, it has three faces, one for each side. Each face of a triangle is a polygon with three vertices and three edges.
Tricky question, because you said 'one face'. A face is usually associated with a three-dimensional object, and a side is usually associated with a two-dimensional object. However, I think I know what you're getting at: It could appear to be a sphere (three dimensional). It is a circle (two dimensional). Keep in mind, that spheres technically have an infinite number of faces (not one), but it's deceiving because you can't see the individual faces of a sphere as they are infinitesimally small and the mind wants to think of it as having only one face since a sphere looks exactly the same no matter what angle you're viewing it from. A circle has one face, of course -- but infinite _sides_. How does that answer your question?
That's impossible. A shape has three or more sides/faces. There is NO shape that has one or two sides/faces