triANGLE
pentagonal pentahedron.
a solid figure with five plane surfaces
the answer is triangle
A 5-sided 2-dimensional figure is a pentagon and a 5-sided 3-dimensional shape is a pentahedron.
It can be a quadrilateral or a triangle.
A pentahedron can be a quadrilateral based pyramid or a triangular prism. A pyramid has only one base and so, since the question specifies "bases", the shape must be the second and so the bases are triangles.
A pentahedron is a 3-D shape and so, not surprisingly, a 3-D pentahedron is called a pentahedron!
pentahedron
triANGLE
It can be a quadrilateral or a triangle.
A pentahedron.
It is a pentahedron. One example of an irregular pentahedron is the 4-sided pyramid.
pentagonal pentahedron.
a solid figure with five plane surfaces
It is a quadrilateral based pyramid.
the answer is triangle