## Prismatoid

A Polyhedron having two Polygons in Parallel planes as bases and Triangular or Trapezoidal lateral faces with one side lying in one base and the opposite Vertex or side lying in the other base. Examples include the Cube, Pyramidal Frustum, Rectangular Parallelepiped, Prism, and Pyramid. Let be the Area of the lower base, the Area of the upper base, the Area of the midsection, and the Altitude. Then