If the triangles are congruent then it is a triangular-based prism.
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The shape described is a triangular prism.
triangular-based prism
An right equilateral triangular prism.
No. A triangle is a two-dimensional polygon (flat figure). It has sides that consist of three line segments, with an interior area. Only a three-dimensional form (polyhedron) can have faces. Triangles serve as faces for any number of polyhedrons, such as pyramids.
a cylinder