Tetrahedron
A 3d shape can have infinite sides
A triangular dipyramid.
sides are the face of a 3d shape and verticies are the corner of the shape
A septadecahedron has 17 sides to it.
the name of a 20 sided 3d shape is called a icosahedron
Tetrahedron
A 3d shape can have infinite sides
a cube or a dodecahedron * * * * * Not a cube, which has only six sides!
A 3d shape with 10 sides is called a decahedron. I have added a link with some pictures of them. As you can see they look very different but all have 10 sides or faces.
well. it is called icosahedron
A triangular dipyramid.
sides are the face of a 3d shape and verticies are the corner of the shape
square
A quadrilateral is a plane or 2d figure with four sides. A 3d shape (object) has a name ending with -hedron, eg a tetrahedron which is a four sided 3d shape. A 3d quadrilateral has no meaning. Sides (edges) do exist in 3d shapes, but a more pertinent attribute is faces. Do you mean by "3d quadrilateral" a 3d shape which has a quadrilateral as a base and at most 4 or 5 other sides, ie a pentahedron (usually called a square pyramid) or a hexahedron (some types of which are called cuboids and cubes)? Please re-ask using consistent terminology, eg What is a 3d shape with one pair of parallel faces and 6 faces?
17
A 20-faced 3D shape is called an icosahedron. It is a polyhedron with 20 equilateral triangle faces, 30 edges, and 12 vertices. The icosahedron is one of the five Platonic solids, which are convex polyhedra with identical regular polygon faces, and it has symmetrical properties that make it a fascinating geometric shape to study.