1. Presented by María Alejandra Fernández M.

2.  Definition: A parallelepiped is a polyhedron with six faces, each a parallelogram and each being parallel to the opposite face. Parallelepipeds are a subclass of the prismatoids.prismatoids

3.  Description: 1. Has three sets of four parallel edges; the edges within each set are of equal length. 2. Has eight vertexes. Edges Vertex

4.  Classification: The Cuboid, also called a rectangular parallelepiped, is a parallelepiped in which all sides are rectangles and perpendicular to each other. The Cube is a cuboid in which all sides are square. The Rhombohedron is a parallelepiped in which all sides are rhombus.

5.  Parallelepiped vs. tetrahedron : 1. Comparison: The Parallelepiped and the Tetrahedron are polyhedrons. 2. Contrast: The Tetrahedron has four triangular faces, three less that the Parallelepiped, and the faces of a tetrahedron are triangles. Also the Tetrahedron has less edges (6) and less vertexes (4). The tetrahedron is, in number, half of faces, edges and vertexes which have a Parallelepiped.

6. The world is full of geometric shapes, and as shown in this initial presentation, we can only describe it using these forms. The parallelepiped is one of the three- dimensional geometric bodies that we find most often in our environment and its various types are an important part of the mathematical study. For this importance that has the parallelepiped, I decide to study it in this presentation.