Describe the two-dimensional figure that results from making a perpendicular slice to a right rectangular pyramid that goes from the base through the apex.
The two-dimensional figure that results from making a perpendicular slice to a right rectangular pyramid that goes from the base through the apex is a triangle. This triangle is formed by the intersection of the plane with the sides of the pyramid, creating a triangle with one vertex at the apex of the pyramid and the other two vertices at points on the base of the pyramid, connected by lines that are perpendicular to the base. The sides of the triangle are equal in length to the sides of the base of the pyramid.
