Answer with explanation:
A pyramid is a three dimensional shape, whose base is any polygon and other faces are triangles,meet at a point.
When, the rectangular pyramid is sliced so that the cross section is perpendicular to its base and passes through its vertex, you can say that the three dimensional view of this shape will be a Rectangular Pyramid or Pyramid having base as a Quadrilateral .
But front view or two dimensional view of this shape will resemble with triangle.
