Any ellipsoid, including the sphere.
it is the property of solid crystal that they have straight edges and flat faces.
A polyhedron is in a subclass of geometric solids. The difference is that a polyhedron must have flat faces and straight edges.
WHAT IS A SOLID WITH TWELVE faces and 30 edgesis a dodecahedron.
that is a cube
triangula prism
it is the property of solid crystal that they have straight edges and flat faces.
Polyhedron is a geometric solid in three dimensions with flat faces and straight edges.
A polyhedron is in a subclass of geometric solids. The difference is that a polyhedron must have flat faces and straight edges.
A polyhedron is defined as a "geometric solid in three dimensions with flat edges and straight faces". As both cylinders and cones have curved faces, neither are polyhedra.
sphere
No, a pyramid is a polyhedron with flat faces and straight edges.
WHAT IS A SOLID WITH TWELVE faces and 30 edgesis a dodecahedron.
triangula prism
that is a cube
This shape is a cube.
A face, of a solid object, is a flat surface. If it is curved it is called a curved surface though sometimes it is also referred to as a face. Two faces meet at an edge, which is a line which may be straight or curved. Three or more faces meet at a point which is a vertex.
I don't know if this is correct.In geometry, a polyhedron is a three-dimensional solid formed from flat planar faces with straight edges. For a regularpolyhedron, each side has the same shape and dimensions.